Prime Number using Function

/*
Write a program in C for prime number using function
*/
#include<stdio.h>

int check_prime(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;
}