#define _CRT_SECURE_NO_WARNINGS//定义一个函数判断素数prime number#include <stdio.h>int prime_number(int y){ int i = 0; for (i = 2; i < y; i++) { if (y % i == 0) return 0; } return 1;}int main(){ int x; scanf_s("%d", &x); if (1 == prime_number(x)) { printf("%d is prime number", x); } else printf("%d not is prime number", x); return 0;}