Prime Number Check


#include <stdio.h>

void check_prime();

int main()
{
    check_prime();
    return 0;
}

void check_prime()
{
    int n, c, flag = 0;
    
    printf("Enter an integer to check whether it is prime or not.\n");
    scanf("%d", &n);
    
    int a = n;
    
    for (c = 2; c <= a - 1; c++)
    {
        if (a % c == 0)
        {
            flag = 1;
            break;
        }
    }
    
    if (flag == 1)
        printf("%d is not prime.\n", n);
    else
        printf("%d is prime.\n", n);
}