#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;
}
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Where is the logic in flag in finding prime number
Programming
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