#define _CRT_SECURE_NO_WARNINGS#include<stdio.h>#include<stdlib.h>intIsLeap(int x){if((x %4==0&& x %100!=0)||(x %400==0))return1;elsereturn0;}intmain(){int a;scanf("%d",&a);if(IsLeap(a)==1)printf("是闰年\n");elseprintf("不是闰年\n");system("pause");return0;}
函数 判断素数
#define _CRT_SECURE_NO_WARNINGS#include<stdio.h>#include<stdlib.h>intPrimenum(int x){for(int i =2; i < x -1; i++){if(x % i ==0)return0;}return1;}voidmain(){int a =0;scanf("%d",&a);if(Primenum(a)==1){printf("是素数\n");}else{printf("不是素数\n");}system("pause");return0;}