printing out primes

// Program to print prime numbers
#include <stdio.h>
#include <stdbool.h>

int main ()
{
    int    p, d;
    _Bool  isPrime;

    for ( p = 2; p <= 50; ++p ) {
        isPrime = 1;

        if (p!=2 && p%2==0){
            isPrime = 0;
        }else{
            for ( d = 3; d < p/2; d+=2 )
            if ( p % d == 0 )
                isPrime = 0;
        }

        if ( isPrime != 0 )
            printf ("%i ", p);
        }
    printf ("\n");
    return 0;


    return 0;
}