Print Primes Using Function

#include <stdio.h>

int check_prime(int);

int main()
{
    int n, result;

    printf("Enter an integer to check whether it is prime or not.\n");
    scanf("%d", &n);

    result = check_prime(n);

    if (result == 1)
        printf("%d is prime.\n", n);
    else
        printf("%d is not prime.\n", n);

    return 0;
}

int check_prime(int a)
{

    int c;

    for (c = 2; c <= a - 1; c++)
    {

        if (a % c == 0)
            return 0;

    }

    if (c == a)
        return 1;
}

OUTPUT

Enter an integer to check whether it is prime or not.
7
7 is prime.