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You can get code of this C++ here ; DOWNLOAD C++ code/* C++ program to check whether a number is prime or not. */
#include <iostream>
using namespace std;
int main()
{
int n, i, flag=0;
cout << "Enter a positive integer: ";
cin >> n;
for(i=2;i<=n/2;++i)
{
if(n%i==0)
{
flag=1;
break;
}
}
if (flag==0)
cout << "This is a prime number";
else
cout << "This is not a prime number";
return 0;
}
The Output
Enter a positive integer: 29
This is a prime number.
Enter a positive integer: 12 This is not a prime number.