C程序 --- 判断闰年平年以及二月天数

闰年满足条件

（1）能被4整除，但不能被100整除

或（2）能被400整除

法一：#include <stdio.h>#include <stdlib.h>main(){int year,flag;printf("please enter year:");scanf("%d",&year);if((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0))flag = 1;elseflag = 0;if(flag)printf("%d is leap year and the days of Feburary are 29. \n",year);elseprintf("%d nonleap year and the days of Feburary are 28\n",year);}法二：#include <stdio.h>#include <stdlib.h>main(){int year,flag;printf("please enter year:");scanf("%d",&year);flag =((year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0))? 1 : 0;if(flag)printf("%d is leap year and the days of Feburary are 29. \n",year);elseprintf("%d nonleap year and the days of Feburary are 28\n",year);}