【C】#KiKi求质数个数#

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

int main() {
    int cnt = 0;
    for (int i = 101; i <= 999; i += 2) {
        int flag = 1;
        for (int j = 2; j <= sqrt(i); j++) {
            if (i % j == 0) {
                flag = 0;
                break;
            }
        }
        if (flag == 1)
            cnt++;
    }
    printf("%d", cnt);
    return 0;
}