I write coding for rounding, and I confuse something
Open Source C & C++ IDE for Windows
Brought to you by:
claplace
Menu
▾
▴
I used Dev c++, and version is 4.9.9.2.
I write coding for rounding, and I confuse something.
Please watch my coding in below:
If I input a=4.15, the output is 4.2
If I input a=4.25, the output is 4.3
If I input a=4.35, the output is still 4.3, but it should be 4.4
Can anyone give me suggestions about this? Thanks.
include <stdio.h>
include <stdlib.h>
int main(){
float a=0; scanf("%f",&a); printf("%f\n\n",(int)(a*10+0.5)/1.0); system("pause"); return 0;}
(int)((a+0.05)*10)/10.0 should work better.. I think
Although 0.5 is a simple number in decimal, it's not in binary
Last edit: Merak 2013-11-08