Answer 1

#include 
void main ()
{
    int prime, C = 0;
    cout << "Enter the number";
    cin >> prime;
    for (int i = 2; i < prime; i++)
    {
       if (prime % i == 0)
       C = 1;
    }
    if (C == 0)
        cout << "The number" << prime << "is prime number" ;
    else
        cout << "The number" << prime << "is not a prime number" ;
}