#include
     
      int main(void){    int year;    printf("Enter The year:");/*输出*/    scanf("%d",&year);/*从键盘输入*/    while(year!=-1){        if((year%4==0&&year%100!=0)||(year输出这一年是闰年*/%400==0)){/*判断当这个数字能被4整除且不能被100整除或者能被400整除*/            printf("The year is 闰年\n");/            printf("Enter The year:");            scanf("%d",&year);        }        else{/*判断*/            printf("The year is not 闰年\n");            printf("Enter The year:");            scanf("%d",&year);/*从键盘输入年*/        }    }    return 0;}