At first let us discuss about the rand() function. rand() function is a predefined method of C++. It is declared in <stdlib.h> header file. rand() is used to generate random number within a range. Here min_n is the minimum range of the random numbers and max_n is the maximum range of the numbers. So rand() will return the random numbers between min_n to (max_n – 1) inclusive of the limit values. Here if we mention lower and upper limits as 1 and 100 respectively, then rand() will return values from 1 to (100 – 1). i.e. from 1 to 99.
Algorithm
Begin Declare max_n to the integer datatype. Initialize max_n = 100. Declare min_n to the integer datatype. Initialize min_n = 1. Declare new_n to the integer datatype. Declare i of integer datatype. Print “The random number is:”. for (i = 0; i < 10; i++) new_n = ((rand() % (max_n + 1 - min_n)) + min_n) Print the value of new_n. End.
Example
#include <iostream>
#include <stdlib.h>
using namespace std;
int main() {
int max_n = 100;
int min_n = 1;
int new_n;
int i;
cout<<"The random number is: \n";
for (i = 0; i < 10; i++) {
new_n = ((rand() % (max_n + 1 - min_n)) + min_n);
//rand() returns random decimal number.
cout<<new_n<<endl;
}
return 0;
}Output
The random number is: 42 68 35 1 70 25 79 59 63 65