crl.cpp

计算机日历程序 (包括判别是否闰年)

#include<stdio.h>


main()
{
	int year,month,day,weeksday,date,s;
	int days[13]={0,31,59,90,120,151,181,212,243,273,304,334,365};   
	printf("输入日期:\n");
	scanf("%d",&day);
	if(day<=0||day>31)   
	{
		printf("日期错误!\n");
	    return 0;
	}
	printf("输入月份:\n");
	scanf("%d",&month);
	if(month<=0||month>12)  
	{
		printf("月份错误!\n");
	    return 0;
	}
	printf("输入年:\n");
	scanf("%d",&year);
	if((year%4==0)-(year%100==0)+(year%400==0))  
	{
		printf("是闰年!\n");
		if(month==1)
			date=days[month-1]+day;
		else
			date=days[month-1]+day+1;
	}
	else
	{
		printf("不是闰年!\n");
		date=days[month-1]+day;
	}
	s=year-1+(year-1)/4-(year-1)/100+(year-1)/400+date; 
    weeksday=s%7;
	printf("时间是:\n");  
	printf("%d-%d-%d:<%d>\n",month,day,year,weeksday);
    return 0;
}