【#文档大全网# 导语】以下是®文档大全网的小编为您整理的《C语言写的日历程序》，欢迎阅读！
#include <stdio.h>
#include <windows.h>
int monthday[12]={31,28,31,30,31,30,31,31,30,31,30,31};
char *mouthname[12]={"Januray 1","February 2","March 3",
"April 4","May 5","June 6",
"July 7","August 8","September 9",
"October 10","November 11","December 12"};
/* 求相应年月日开始的天数 */
int week(int y,int m,int d)
{
int w;
if((m==1)||(m==2))
{
y--;
m+=12;
}
w=(d+2*m+3*(m+1)/5+y+y/4-y/100+y/400+1)%7;
return (w);
}
void main()
{
int y,w,i,m=1,d=1,d2=1;
while(1)
{
printf("\n请输入一个年份yyyy：\n");
scanf("%d",&y);
if(y==0)break;
if (y%4==0&&y%100!=0) monthday[1]=29;
for(m=1;m<=11;m++)
{
printf("\n%-27s",mouthname[m-1]);
printf("\t%-27s\n",mouthname[m]);
printf("Sun Mon Tue Wed Thu Fri Sat");
printf("\tSun Mon Tue Wed Thu Fri Sat\n");
d2=1;
for(d=1;d<=monthday[m-1];d++)
{
w=week(y,m,d);
if(d==1)
for (i=0;i<w;i++) printf(" ");
printf("%3d ",d);
if(w==6)
{
printf("\t");
for(;d2<=monthday[m];d2++)
{
w=week(y,m+1,d2);
if(d2==1)
for (i=0;i<w;i++) printf(" ");
printf("%3d ",d2);
if(w==6)
{
d2++;
break;
}
}
printf(" \n");
}
}
printf("\n===========================");
printf("\t===========================\n");
}
}
}
2022-10-06
