dev-cpp-users Mailing List for Dev-C++

it does not give me a line number but I am really sure the issue is from my
vector usage (vector n00b).

If I remove line 47 from this code ->  <http://pastie.org/4790174>
http://pastie.org/4790174 the problem goes away (I also lose 90% of my
functions).

The only thing that changed is that on line 96 (setValuesfromffmpeg) the
populating of the vector data in that function, used to be an array and the
vector is being declared now in the .h (so that it can be reached by my .h,
so it is there for a reason) here line 9 ->  <http://pastie.org/4790176>
http://pastie.org/4790176

complete error ->   <http://pastie.org/4790168> http://pastie.org/4790168

 

 

Brad

 

In this psuedo code, what would block line 25 from accessing line 32?
http://pastie.org/4783374 

line 18, 22 and 25, laArray is undefined even though it is plenty defined in
main()

form1
 <http://pastie.org/4783166> http://pastie.org/4783166

main()
 <http://pastie.org/4783187> http://pastie.org/4783187

error:
 <http://pastie.org/4783179> http://pastie.org/4783179

Why can't I access laArray in main() from form1?

 

Brad 

 

Hello,

It's undefined in the standard.... the sub expressions can be
calculated in any order.... ie...

= a++ + b++ + a + b;
a++ could be calculated before or after any of the following
b++ ,
a ,
b,

Since the side effects of the a++ and b++ change the value of the
later it is undefined in C or C++

See also: http://en.wikipedia.org/wiki/Unspecified_behavior

On Thu, Sep 20, 2012 at 9:50 PM, Reid Thompson <rei...@at...> wrote:
> On 9/20/2012 9:08 PM, Mani wrote:
>> I think I might argue with one point way below.. please scroll down..
>>
>> On Thu, Sep 20, 2012 at 4:08 PM, Reid Thompson <Rei...@at...> wrote:
>>> On Thu, 2012-09-20 at 12:54 -0400, Mani wrote:
>>>> Hi,
>>>>
>>>> I recently to try some toy things in DevC++ (version I am using is 4.9.9.2)
>>>>
>>>> The code I had was this:
>>>>
>>>>      int a = 1, b = 2;
>>>>      int c = a++ + b++ + a + b;
>>>>
>>>>      cout << "a = " << a << endl;
>>>>      cout << "b = " << b << endl;
>>>>      cout << "c = " << c << endl;
>>>>
>>>> I expected the c value to be 8 (by operator precedence, ++ has higher
>>>> precedence than +, so do in order:
>>>> a++, then b++
>>>> then do (a++ + b++)
>>>> then add the previous result and a
>>>> then add the previous result and b
>>>>
>>>> but the answer I got was 6..
>>>>
>>>> what might be the reason for this..??
>>>>
>>>> thanks, murali
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Everyone hates slow websites. So do we.
>>>> Make your web apps faster with AppDynamics
>>>> Download AppDynamics Lite for free today:
>>>> http://ad.doubleclick.net/clk;258768047;13503038;j?
>>>> http://info.appdynamics.com/FreeJavaPerformanceDownload.html
>>>> _______________________________________________
>>>> Dev-cpp-users mailing list
>>>> Dev...@li...
>>>> TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
>>>> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>>> [16:06:54][94s] rthompso@raker2> ~
>>> $ cat helloworld.c
>>> #include <stdio.h>
>>> #include <stdlib.h>
>>> int main(void)
>>> {
>>>      int a = 1, b = 2;
>>>      int c = a++ + b++ + a + b;
>>>
>>>      printf("c is %d\n", c);
>>>      a = 1;
>>>      b = 2;
>>>      c = ++a + ++b + a + b;
>>>
>>>      printf("c is %d\n", c);
>>>
>>>      return 0;
>>>
>>> }
>>>
>>> [16:07:01][0s] rthompso@raker2> ~
>>> $ cat Hello.cs
>>> using System;
>>>
>>> class Program
>>> {
>>>      static void Main()
>>>      {
>>>          int a = 1, b = 2;
>>>          int c = a++ + b++ + a + b;
>>>
>>>          Console.WriteLine(c);
>>>          Console.WriteLine("Hello world!");
>>>
>>>          a = 1;
>>>          b = 2;
>>>          c = ++a + ++b + a + b;
>>>          Console.WriteLine(c);
>>>          Console.WriteLine("Hello world!");
>>>
>>>
>>>          a = 1;
>>>          b = 2;
>>>          c = a++ + b++;
>>>          int d =  c + a + b;
>>>
>>>          Console.WriteLine(d);
>>>      }
>>> }
>>>
>>> [16:07:26][0s] rthompso@raker2> ~
>>> $ ./a.out
>>> c is 6
>>> c is 10
>>>
>>> [16:07:30][0s] rthompso@raker2> ~
>>> $ mono Hello.exe
>>> 8
>>> Hello world!
>>> 10
>>> Hello world!
>>> 8
>>>
>>>
>>> gcc C
>>> n++ -> increment after use
>>>>      int a = 1, b = 2;
>>>>      int c = a++ + b++ + a + b;
>>>            c = 1 + 2 + 1 + 2
>>>            c = 6
>>>
>>> ++n -> increment before use
>>>>      int a = 1, b = 2;
>>>>      int c = ++a + ++b + a + b;
>>>            c = 2 + 3 + 2 + 3
>>>            c = 10
>>>
>>> mcs csharp
>>> evidently creates an incremented copy and uses it with the original
>>> value
>>>>      int a = 1, b = 2;
>>>>      int c = a++ + b++ + a + b;
>>>            c = 2 + 3 + 1 + 2
>>>            c = 8
>>>>>> BEGIN: Murali:
>> How can you be sure that this is what happens.. I am inclined to
>> believe what happens is:
>> c = 1 + 2 + 2 + 3
>> c = 8
>>
>>>>>> END: Murali
>>> ++n -> increment before use
>>>>      int a = 1, b = 2;
>>>>      int c = ++a + ++b + a + b;
>>>            c = 2 + 3 + 2 + 3
>>>            c = 10
>>>
>>>          a = 1;
>>>          b = 2;
>>>          c = a++ + b++;
>>>          int d =  c + a + b;
>>>          c = 5
>>>          d = 5 + 1 + 2
>>>          d = 8
>>>
>>>
> ok -- you are most likely correct.
>
> ------------------------------------------------------------------------------
> Got visibility?
> Most devs has no idea what their production app looks like.
> Find out how fast your code is with AppDynamics Lite.
> http://ad.doubleclick.net/clk;262219671;13503038;y?
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> _______________________________________________
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On 9/20/2012 9:08 PM, Mani wrote:
> I think I might argue with one point way below.. please scroll down..
>
> On Thu, Sep 20, 2012 at 4:08 PM, Reid Thompson <Rei...@at...> wrote:
>> On Thu, 2012-09-20 at 12:54 -0400, Mani wrote:
>>> Hi,
>>>
>>> I recently to try some toy things in DevC++ (version I am using is 4.9.9.2)
>>>
>>> The code I had was this:
>>>
>>>      int a = 1, b = 2;
>>>      int c = a++ + b++ + a + b;
>>>
>>>      cout << "a = " << a << endl;
>>>      cout << "b = " << b << endl;
>>>      cout << "c = " << c << endl;
>>>
>>> I expected the c value to be 8 (by operator precedence, ++ has higher
>>> precedence than +, so do in order:
>>> a++, then b++
>>> then do (a++ + b++)
>>> then add the previous result and a
>>> then add the previous result and b
>>>
>>> but the answer I got was 6..
>>>
>>> what might be the reason for this..??
>>>
>>> thanks, murali
>>>
>>> ------------------------------------------------------------------------------
>>> Everyone hates slow websites. So do we.
>>> Make your web apps faster with AppDynamics
>>> Download AppDynamics Lite for free today:
>>> http://ad.doubleclick.net/clk;258768047;13503038;j?
>>> http://info.appdynamics.com/FreeJavaPerformanceDownload.html
>>> _______________________________________________
>>> Dev-cpp-users mailing list
>>> Dev...@li...
>>> TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
>>> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>> [16:06:54][94s] rthompso@raker2> ~
>> $ cat helloworld.c
>> #include <stdio.h>
>> #include <stdlib.h>
>> int main(void)
>> {
>>      int a = 1, b = 2;
>>      int c = a++ + b++ + a + b;
>>
>>      printf("c is %d\n", c);
>>      a = 1;
>>      b = 2;
>>      c = ++a + ++b + a + b;
>>
>>      printf("c is %d\n", c);
>>
>>      return 0;
>>
>> }
>>
>> [16:07:01][0s] rthompso@raker2> ~
>> $ cat Hello.cs
>> using System;
>>
>> class Program
>> {
>>      static void Main()
>>      {
>>          int a = 1, b = 2;
>>          int c = a++ + b++ + a + b;
>>
>>          Console.WriteLine(c);
>>          Console.WriteLine("Hello world!");
>>
>>          a = 1;
>>          b = 2;
>>          c = ++a + ++b + a + b;
>>          Console.WriteLine(c);
>>          Console.WriteLine("Hello world!");
>>
>>
>>          a = 1;
>>          b = 2;
>>          c = a++ + b++;
>>          int d =  c + a + b;
>>
>>          Console.WriteLine(d);
>>      }
>> }
>>
>> [16:07:26][0s] rthompso@raker2> ~
>> $ ./a.out
>> c is 6
>> c is 10
>>
>> [16:07:30][0s] rthompso@raker2> ~
>> $ mono Hello.exe
>> 8
>> Hello world!
>> 10
>> Hello world!
>> 8
>>
>>
>> gcc C
>> n++ -> increment after use
>>>      int a = 1, b = 2;
>>>      int c = a++ + b++ + a + b;
>>            c = 1 + 2 + 1 + 2
>>            c = 6
>>
>> ++n -> increment before use
>>>      int a = 1, b = 2;
>>>      int c = ++a + ++b + a + b;
>>            c = 2 + 3 + 2 + 3
>>            c = 10
>>
>> mcs csharp
>> evidently creates an incremented copy and uses it with the original
>> value
>>>      int a = 1, b = 2;
>>>      int c = a++ + b++ + a + b;
>>            c = 2 + 3 + 1 + 2
>>            c = 8
>>>>> BEGIN: Murali:
> How can you be sure that this is what happens.. I am inclined to
> believe what happens is:
> c = 1 + 2 + 2 + 3
> c = 8
>
>>>>> END: Murali
>> ++n -> increment before use
>>>      int a = 1, b = 2;
>>>      int c = ++a + ++b + a + b;
>>            c = 2 + 3 + 2 + 3
>>            c = 10
>>
>>          a = 1;
>>          b = 2;
>>          c = a++ + b++;
>>          int d =  c + a + b;
>>          c = 5
>>          d = 5 + 1 + 2
>>          d = 8
>>
>>
ok -- you are most likely correct.

I think I might argue with one point way below.. please scroll down..

On Thu, Sep 20, 2012 at 4:08 PM, Reid Thompson <Rei...@at...> wrote:
> On Thu, 2012-09-20 at 12:54 -0400, Mani wrote:
>> Hi,
>>
>> I recently to try some toy things in DevC++ (version I am using is 4.9.9.2)
>>
>> The code I had was this:
>>
>>     int a = 1, b = 2;
>>     int c = a++ + b++ + a + b;
>>
>>     cout << "a = " << a << endl;
>>     cout << "b = " << b << endl;
>>     cout << "c = " << c << endl;
>>
>> I expected the c value to be 8 (by operator precedence, ++ has higher
>> precedence than +, so do in order:
>> a++, then b++
>> then do (a++ + b++)
>> then add the previous result and a
>> then add the previous result and b
>>
>> but the answer I got was 6..
>>
>> what might be the reason for this..??
>>
>> thanks, murali
>>
>> ------------------------------------------------------------------------------
>> Everyone hates slow websites. So do we.
>> Make your web apps faster with AppDynamics
>> Download AppDynamics Lite for free today:
>> http://ad.doubleclick.net/clk;258768047;13503038;j?
>> http://info.appdynamics.com/FreeJavaPerformanceDownload.html
>> _______________________________________________
>> Dev-cpp-users mailing list
>> Dev...@li...
>> TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
>> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>
> [16:06:54][94s] rthompso@raker2> ~
> $ cat helloworld.c
> #include <stdio.h>
> #include <stdlib.h>
> int main(void)
> {
>     int a = 1, b = 2;
>     int c = a++ + b++ + a + b;
>
>     printf("c is %d\n", c);
>     a = 1;
>     b = 2;
>     c = ++a + ++b + a + b;
>
>     printf("c is %d\n", c);
>
>     return 0;
>
> }
>
> [16:07:01][0s] rthompso@raker2> ~
> $ cat Hello.cs
> using System;
>
> class Program
> {
>     static void Main()
>     {
>         int a = 1, b = 2;
>         int c = a++ + b++ + a + b;
>
>         Console.WriteLine(c);
>         Console.WriteLine("Hello world!");
>
>         a = 1;
>         b = 2;
>         c = ++a + ++b + a + b;
>         Console.WriteLine(c);
>         Console.WriteLine("Hello world!");
>
>
>         a = 1;
>         b = 2;
>         c = a++ + b++;
>         int d =  c + a + b;
>
>         Console.WriteLine(d);
>     }
> }
>
> [16:07:26][0s] rthompso@raker2> ~
> $ ./a.out
> c is 6
> c is 10
>
> [16:07:30][0s] rthompso@raker2> ~
> $ mono Hello.exe
> 8
> Hello world!
> 10
> Hello world!
> 8
>
>
> gcc C
> n++ -> increment after use
>>     int a = 1, b = 2;
>>     int c = a++ + b++ + a + b;
>           c = 1 + 2 + 1 + 2
>           c = 6
>
> ++n -> increment before use
>>     int a = 1, b = 2;
>>     int c = ++a + ++b + a + b;
>           c = 2 + 3 + 2 + 3
>           c = 10
>
> mcs csharp
> evidently creates an incremented copy and uses it with the original
> value
>>     int a = 1, b = 2;
>>     int c = a++ + b++ + a + b;
>           c = 2 + 3 + 1 + 2
>           c = 8

>>>> BEGIN: Murali:

How can you be sure that this is what happens.. I am inclined to
believe what happens is:
c = 1 + 2 + 2 + 3
c = 8

>>>> END: Murali

>
> ++n -> increment before use
>>     int a = 1, b = 2;
>>     int c = ++a + ++b + a + b;
>           c = 2 + 3 + 2 + 3
>           c = 10
>
>         a = 1;
>         b = 2;
>         c = a++ + b++;
>         int d =  c + a + b;
>         c = 5
>         d = 5 + 1 + 2
>         d = 8
>
>

On Thu, 2012-09-20 at 12:54 -0400, Mani wrote:
> Hi,
> 
> I recently to try some toy things in DevC++ (version I am using is 4.9.9.2)
> 
> The code I had was this:
> 
>     int a = 1, b = 2;
>     int c = a++ + b++ + a + b;
> 
>     cout << "a = " << a << endl;
>     cout << "b = " << b << endl;
>     cout << "c = " << c << endl;
> 
> I expected the c value to be 8 (by operator precedence, ++ has higher
> precedence than +, so do in order:
> a++, then b++
> then do (a++ + b++)
> then add the previous result and a
> then add the previous result and b
> 
> but the answer I got was 6..
> 
> what might be the reason for this..??
> 
> thanks, murali
> 
> ------------------------------------------------------------------------------
> Everyone hates slow websites. So do we.
> Make your web apps faster with AppDynamics
> Download AppDynamics Lite for free today:
> http://ad.doubleclick.net/clk;258768047;13503038;j?
> http://info.appdynamics.com/FreeJavaPerformanceDownload.html
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users

[16:06:54][94s] rthompso@raker2> ~ 
$ cat helloworld.c 
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
    int a = 1, b = 2;
    int c = a++ + b++ + a + b;

    printf("c is %d\n", c);
    a = 1;
    b = 2;
    c = ++a + ++b + a + b;

    printf("c is %d\n", c);

    return 0;

}

[16:07:01][0s] rthompso@raker2> ~ 
$ cat Hello.cs 
using System;
 
class Program
{
    static void Main()
    {
        int a = 1, b = 2;
        int c = a++ + b++ + a + b;

        Console.WriteLine(c);
        Console.WriteLine("Hello world!");

        a = 1;
        b = 2;
        c = ++a + ++b + a + b;
        Console.WriteLine(c);
        Console.WriteLine("Hello world!");


        a = 1;
        b = 2;
        c = a++ + b++;
        int d =  c + a + b;

        Console.WriteLine(d);
    }
}

[16:07:26][0s] rthompso@raker2> ~ 
$ ./a.out
c is 6
c is 10

[16:07:30][0s] rthompso@raker2> ~ 
$ mono Hello.exe
8
Hello world!
10
Hello world!
8


gcc C
n++ -> increment after use
>     int a = 1, b = 2;
>     int c = a++ + b++ + a + b;
          c = 1 + 2 + 1 + 2
          c = 6

++n -> increment before use
>     int a = 1, b = 2;
>     int c = ++a + ++b + a + b;
          c = 2 + 3 + 2 + 3
          c = 10
    
mcs csharp
evidently creates an incremented copy and uses it with the original
value
>     int a = 1, b = 2;
>     int c = a++ + b++ + a + b;
          c = 2 + 3 + 1 + 2
          c = 8

++n -> increment before use
>     int a = 1, b = 2;
>     int c = ++a + ++b + a + b;
          c = 2 + 3 + 2 + 3
          c = 10

        a = 1;
        b = 2;
        c = a++ + b++;
        int d =  c + a + b;
        c = 5
        d = 5 + 1 + 2 
        d = 8

Thanks for all the comments.. I had posted to mingw-users mailing list
as well, I had lots of good responses there (I had posted here w/o
looking at those responses..)

for those interested, you can see these at:
http://sourceforge.net/mailarchive/forum.php?thread_name=5058E683.1010205%40users.sourceforge.net&forum_name=mingw-users

thanks once again for your time.

best, murali.

On Thu, Sep 20, 2012 at 2:15 PM, Brothers, Robert
<rob...@tq...> wrote:
> Murali,
>
> I'm not a C++ programmer (use C# mostly), but I put your original code
> into Visual Studio C++.net and it gave the c = 6 result as well.
>
> The code Mani offered ( ++a + ++b + a + b) gave the value of 10 (which I
> tend to feel is understandable since the value of a and b are
> incremented first then 2 + 3 + 2 + 3 = 10).
>
> If I write the code as:
>
> int a = 1, b = 2;
> int c = a++ + b++;
> c += a + b;
>
> I DO get 8 as the result.
>
> Also, in C#, your original code give 8 as you found in Java.
>
> As I said, I'm not a C++ programmer (I'm a EE not a programmer;^)
>
> Regards
> Bob
>
>
>
> -----Original Message-----
> From: Mani [mailto:man...@gm...]
> Sent: Thursday, September 20, 2012 1:09 PM
> To: a.geo
> Cc: dev...@li...
> Subject: Re: [Dev-C++] Question about increment..
>
> Hi,
>
> But this is not right, if I understand precedence rules correctly..
> ++ has higher precedence than addition.. your explanation seems to say
> that ++ is done after addition..
>
> In Java, the same expression gives 8.., and  I believe other C++
> compilers also gave 8 (I heard from others; I have not tested this
> myself -- I did test what happens in Java myself).
>
> I am inclined to think this looks like a bug..??
>
> thanks, murali.
>
> On Thu, Sep 20, 2012 at 1:04 PM, a.geo <aqu...@gm...> wrote:
>> Well, you really are doing the next
>>
>> int a = 1, b = 2;
>> int c = a + b + a + b;
>> a++;
>> b++;
>> This is why you get 6, remember the ++ is a prefix in this case, then,
> is
>> executed NEXT to the expression.
>>
>>
>> int c = ++a + ++b + a + b;
>> Well, if this compile correctly, give you the 8 value, because
>>
>> int a = 1, b = 2;
>> ++a;
>> ++b;
>> int c = a + b + a + b;
>>
>> 2012/9/20 Mani <man...@gm...>
>>>
>>> Hi,
>>>
>>> I recently to try some toy things in DevC++ (version I am using is
>>> 4.9.9.2)
>>>
>>> The code I had was this:
>>>
>>>     int a = 1, b = 2;
>>>     int c = a++ + b++ + a + b;
>>>
>>>     cout << "a = " << a << endl;
>>>     cout << "b = " << b << endl;
>>>     cout << "c = " << c << endl;
>>>
>>> I expected the c value to be 8 (by operator precedence, ++ has higher
>>> precedence than +, so do in order:
>>> a++, then b++
>>> then do (a++ + b++)
>>> then add the previous result and a
>>> then add the previous result and b
>>>
>>> but the answer I got was 6..
>>>
>>> what might be the reason for this..??
>>>
>>> thanks, murali
>>>
>
> ------------------------------------------------------------------------
> ------
> Everyone hates slow websites. So do we.
> Make your web apps faster with AppDynamics
> Download AppDynamics Lite for free today:
> http://ad.doubleclick.net/clk;258768047;13503038;j?
> http://info.appdynamics.com/FreeJavaPerformanceDownload.html
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> TO UNSUBSCRIBE: http://www23.brinkster.com/noicys/devcpp/ub.htm
> https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>
>

Hi,

But this is not right, if I understand precedence rules correctly..
++ has higher precedence than addition.. your explanation seems to say
that ++ is done after addition..

In Java, the same expression gives 8.., and  I believe other C++
compilers also gave 8 (I heard from others; I have not tested this
myself -- I did test what happens in Java myself).

I am inclined to think this looks like a bug..??

thanks, murali.

On Thu, Sep 20, 2012 at 1:04 PM, a.geo <aqu...@gm...> wrote:
> Well, you really are doing the next
>
> int a = 1, b = 2;
> int c = a + b + a + b;
> a++;
> b++;
> This is why you get 6, remember the ++ is a prefix in this case, then, is
> executed NEXT to the expression.
>
>
> int c = ++a + ++b + a + b;
> Well, if this compile correctly, give you the 8 value, because
>
> int a = 1, b = 2;
> ++a;
> ++b;
> int c = a + b + a + b;
>
> 2012/9/20 Mani <man...@gm...>
>>
>> Hi,
>>
>> I recently to try some toy things in DevC++ (version I am using is
>> 4.9.9.2)
>>
>> The code I had was this:
>>
>>     int a = 1, b = 2;
>>     int c = a++ + b++ + a + b;
>>
>>     cout << "a = " << a << endl;
>>     cout << "b = " << b << endl;
>>     cout << "c = " << c << endl;
>>
>> I expected the c value to be 8 (by operator precedence, ++ has higher
>> precedence than +, so do in order:
>> a++, then b++
>> then do (a++ + b++)
>> then add the previous result and a
>> then add the previous result and b
>>
>> but the answer I got was 6..
>>
>> what might be the reason for this..??
>>
>> thanks, murali
>>

Change prefix by postfix... : D


2012/9/20 a.geo <aqu...@gm...>

> Well, you really are doing the next
>
> int a = 1, b = 2;
> int c = a + b + a + b;
> a++;
> b++;
> This is why you get 6, remember the ++ is a prefix in this case, then, is
> executed NEXT to the expression.
>
> int c = ++a + ++b + a + b;
> Well, if this compile correctly, give you the 8 value, because
>
> int a = 1, b = 2;
> ++a;
> ++b;
> int c = a + b + a + b;
>
>
> 2012/9/20 Mani <man...@gm...>
>
>> Hi,
>>
>> I recently to try some toy things in DevC++ (version I am using is
>> 4.9.9.2)
>>
>> The code I had was this:
>>
>>     int a = 1, b = 2;
>>     int c = a++ + b++ + a + b;
>>
>>     cout << "a = " << a << endl;
>>     cout << "b = " << b << endl;
>>     cout << "c = " << c << endl;
>>
>> I expected the c value to be 8 (by operator precedence, ++ has higher
>> precedence than +, so do in order:
>> a++, then b++
>> then do (a++ + b++)
>> then add the previous result and a
>> then add the previous result and b
>>
>> but the answer I got was 6..
>>
>> what might be the reason for this..??
>>
>> thanks, murali
>>
>>
>> ------------------------------------------------------------------------------
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>>
>
>
>
> --
> Cesar De la Cruz Rojas
>
> *La mision de un buen soldado, no es morir por su patria, sino, lograr
> que el soldado enemigo muera por la suya...*
> *
> -----------------------------------------------------------------------------
> *
> Sennior Software Engineer
>
> -----------------------------------------------------------------------------
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>


-- 
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*La mision de un buen soldado, no es morir por su patria, sino, lograr que
el soldado enemigo muera por la suya...*
*
-----------------------------------------------------------------------------
*
Sennior Software Engineer
-----------------------------------------------------------------------------
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Hi,

I recently to try some toy things in DevC++ (version I am using is 4.9.9.2)

The code I had was this:

    int a = 1, b = 2;
    int c = a++ + b++ + a + b;

    cout << "a = " << a << endl;
    cout << "b = " << b << endl;
    cout << "c = " << c << endl;

I expected the c value to be 8 (by operator precedence, ++ has higher
precedence than +, so do in order:
a++, then b++
then do (a++ + b++)
then add the previous result and a
then add the previous result and b

but the answer I got was 6..

what might be the reason for this..??

thanks, murali

My data is almost in its function but I am having difficulties with the
final step. Goal: To get the array data into a textbox window on line 406
and 407 of -> http://pastie.org/4742333 But I am getting this error
http://pastie.org/4742347 and I have tried a few different versions of
passing the argument but no success.

 

Brad 

 

From: bibigiu [mailto:bi...@al...] 
Sent: Monday, September 17, 2012 11:30 AM
To: Brad
Subject: Re: [Dev-C++] how to pass a string array to another function

 

Il 17/09/2012 14:40, Brad ha scritto:

That's the problem, my function is not in main() and this is where the
errors get weird is when I pass the same arguments  in a function outside of
main.

 

Brad

 

From: bibigiu [mailto:bi...@al...] 
Sent: Monday, September 17, 2012 8:04 AM
To: Brad
Subject: Re: [Dev-C++] how to pass a string array to another function

 

Il 17/09/2012 13:40, Brad ha scritto:

My situation is this, I have a string array that I am trying to get the data
to another function but have issues with the return type conflicting with
either the function definition or the array data being passed.

 

std::array Array[2]

 

std::string f()

{

array[0]=ted

array[1]=bundy

return Array[2];

}};

 

void printarray (int arg[], int length) {

  for (int n=0; n<length; n++)

    cout << Array[n] << endl;

}

 

int main ()

{

  printarray();

  return 0;

}

 

 

try this :

  #include <iostream>
using namespace std;

    void PrintArray(std::string str[],int length)
    {
    for(int a=0;a<length;a++)
        {
        cout<< str[a].c_str() << endl;
        }
    }

int main()
{
    std::string str[2];
    str[0] = "hello";
    str[1] = "bye";
    PrintArray(str,2);
    return 0;
}

     




 







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ops... try this 
  void PrintArray(std::string *str,int length)
    {
    for(int a=0;a<length;a++)
        {
        cout<< str[a].c_str() << endl;
        }
    }
string* CreateStrArray(int size)
    {
    std::string *str = new std::string[size];
    for(int a=0;a<size;a++)
        str[a] = "name";
    return str;
    }

int main( )
{
    std::string *str = CreateStrArray(2);// you must use pointer allocation
with new(on the heap) for return object from a function... local variable
created in the function are destroyed   when    return from the function!!!!
    PrintArray(str,2);

    return 0;
}
 is that what you want?

My data is almost in its function but I am having difficulties with the
final step.

Goal: To get the array data into a textbox window on line 406 and 407 of ->
http://pastie.org/4742333

But I am getting this error http://pastie.org/4742347 and I have tried a few
different versions of passing the argument but no success.

The array data is generated by my case statements starting on line 79 on
http://pastie.org/4742337 in my main()  <following earlier recommendations>

This last screw is giving me fits.  :(

 

 

Brad 

 

From: bibigiu [mailto:bi...@al...] 
Sent: Monday, September 17, 2012 8:04 AM
To: Brad
Subject: Re: [Dev-C++] how to pass a string array to another function

 

Il 17/09/2012 13:40, Brad ha scritto:

My situation is this, I have a string array that I am trying to get the data
to another function but have issues with the return type conflicting with
either the function definition or the array data being passed.

 

std::array Array[2]

 

std::string f()

{

array[0]=ted

array[1]=bundy

return Array[2];

}};

 

void printarray (int arg[], int length) {

  for (int n=0; n<length; n++)

    cout << Array[n] << endl;

}

 

int main ()

{

  printarray();

  return 0;

}

 

 

try this :

  #include <iostream>
using namespace std;

    void PrintArray(std::string str[],int length)
    {
    for(int a=0;a<length;a++)
        {
        cout<< str[a].c_str() << endl;
        }
    }

int main()
{
    std::string str[2];
    str[0] = "hello";
    str[1] = "bye";
    PrintArray(str,2);
    return 0;
}

     



 






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That's the problem, my function is not in main() and this is where the
errors get weird is when I pass the same arguments  in a function outside of
main.

 

Brad

 

From: bibigiu [mailto:bi...@al...] 
Sent: Monday, September 17, 2012 8:04 AM
To: Brad
Subject: Re: [Dev-C++] how to pass a string array to another function

 

Il 17/09/2012 13:40, Brad ha scritto:

My situation is this, I have a string array that I am trying to get the data
to another function but have issues with the return type conflicting with
either the function definition or the array data being passed.

 

std::array Array[2]

 

std::string f()

{

array[0]=ted

array[1]=bundy

return Array[2];

}};

 

void printarray (int arg[], int length) {

  for (int n=0; n<length; n++)

    cout << Array[n] << endl;

}

 

int main ()

{

  printarray();

  return 0;

}

 

 

try this :

  #include <iostream>
using namespace std;

    void PrintArray(std::string str[],int length)
    {
    for(int a=0;a<length;a++)
        {
        cout<< str[a].c_str() << endl;
        }
    }

int main()
{
    std::string str[2];
    str[0] = "hello";
    str[1] = "bye";
    PrintArray(str,2);
    return 0;
}

     



 






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threat landscape has changed and how IT managers can respond. Discussions 
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My situation is this, I have a string array that I am trying to get the data
to another function but have issues with the return type conflicting with
either the function definition or the array data being passed.

 

std::array Array[2]

 

std::string f()

{

array[0]=ted

array[1]=bundy

return Array[2];

}};

 

void printarray (int arg[], int length) {

  for (int n=0; n<length; n++)

    cout << Array[n] << endl;

}

 

int main ()

{

  printarray();

  return 0;

}

 

 

Brad

 

sir,
   i am having dev c++.but in that BGI folder is not there which is used to
run graphics programming of " computer graphics "so plz help me to sort out
this prob
thank you.
.

I am trying to get a basic window to flash data into a basic textbox using
winform c++/cli

I am stuck in a maze between system::string and std::sting and all I am
trying to do is display my first value in a textbox in a windows.  ->
http://pastie.org/4687404

 

Brad

 

sir,
     I am not able to run my graphics program in dev c++ file version
4.9.9.2  .
     It is creating a problem as i have to submit a project.
     plz help me by sending latest version of dev c++ in which graphics
program can run.


thank you.