打印编程

开发平台：

Visual C++

wangnianli.cpp：源码内容

							#include<stdio.h>
void disp(int);
int leap_year(int);
int date(int,int,int);
void main()
{
	int year=0;
	printf("Input year(XXXX):");
	scanf("%d",&year);
	disp(year);
}
int leap_year(int year)//判断是否是闰年
{
	if((year%4==0&&year%100!=0)||(year%400==0))
		return(1);
	else
		return(0);
}
int date(int year,int month,int day)//计算某年某月某日是星期几
{
	int leap,days,sum;//days计算某个日期起,这一年的天数
	days=0;
	leap=leap_year(year);
	switch(month-1)
	{
	case 11:days+=30;
	case 10:days+=31;
	case 9:days+=30;
	case 8:days+=31;
	case 7:days+=31;
	case 6:days+=30;
	case 5:days+=31;
	case 4:days+=30;
	case 3:days+=31;
	case 2:if(leap)
			   days+=29;
		else
			days+=28;
	case 1:days+=31;
	default:days+=day;
	}
	sum=year-1+(year-1)/4-(year-1)/100+(year-1)/400+days;//这是工式,计算sum这天是星期几,用总的天数模除7
	return(sum%7);
}
void disp(int year)//打印输出算法
{
	int i,j,k,leap,days,count,n;
	leap=leap_year(year);
	days=date(year,1,1);//计算某年的第一天是星期几
	printf("%d年n",year);
	for(i=1;i<=12;i++)
	{
		printf("%3d月份n",i);
		printf("n");
		printf("t");
		printf("%-8s%-8s%-8s%-8s%-8s%-8s%-8sn","Sun","Mon","Tues","Wed","Thurs","Fri","Sat");//格式化输出字符串
		n=days;
		printf("t");
		for(j=1;j<=8*days;j++)
			printf(" ");//输出空格,为了让数字与日期对齐
		switch(i)
		{
		case 1:
		case 3:
		case 5:
		case 7:
		case 8:
		case 10:
		case 12:count=31;
			break;
		case 4:
		case 6:
		case 9:
		case 11:count=30;
			break;
		case 2:
			if(leap)
				count=29;
			else
				count=28;
			break;
		}
		for(k=1;k<=count;k++)//控制界面对齐
		{
			printf("%-8d",k);//从每个月的1号开始输出
			n++;
			if(n==7)
			{
				printf("n");
				printf("t");
				n=0;
			}
		}
		printf("nn");
		days=n;
	}
}
		

						