جوابش

#include <stdio.h>
#include <math.h>

typedef char BOOL;

BOOL is_prime(int n)
{
    if (n < 2) return (BOOL)0; 
    for (int i = 2; i <= sqrt(n); ++i)
        if (n % i == 0)
            return (BOOL)0;
    return (BOOL)1;
}

int main()
{
    int n = 50;
    BOOL firstPrint = 1;

    printf("[");
    for (int i = 2; i < n; ++i) {
        if (is_prime(i) == (BOOL)1) {
            if (!firstPrint) {
                printf(", ");
            }
            printf("%d", i);
            firstPrint = 0;
        }
    }
    printf("]");

    return 0;
}

توسط @lmfho