2020-02-13
/*
判断一个数是否是素数*/# include <stdio.h>int IsPrime(int val){ int i; for (i=2; i<val; ++i) { if (val%i == 0) break; } if (i == val) return 1; else return 0;}int main(void){ int m; scanf("%d", &m); if ( IsPrime(m) ) printf(“Yes!\n”); else printf(“No!\n”); return 0;}