C语言日历源代码.doc

#include<stdio.h>
main()
{
intyear,month,day,num_month;
intj,num=0;
printf("请输入年份:");
scanf("%d",&year);
printf("请输入月份:");
scanf("%d",&month);
for(j=1980;j<year;j++)
{if(j%4==0&&j%100!=0||j%400==0)num+=366;
elsenum+=365;}
switch(month)
{case12:num+=30;
case11:num+=31;
case10:num+=30;
case9:num+=31;
case8:num+=31;
case7:num+=30;
case6:num+=31;
case5:num+=30;
case4:num+=31;
case3:if(j%4==0&&j%100!=0||j%400==0)num+=29;
elsenum+=28;
case2:num+=31;
case1:;}
switch(month)
{case1:num_month=31;break;
case2:if(year%4==0&&year%100!=0||year%400==0)num_month=29;
elsenum_month=28;break;
case3:num_month=31;break;
case4:num_month=30;break;
case5:num_month=31;break;
case6:num_month=30;break;
case7:num_month=31;break;
case8:num_month=31;break;
case9:num_month=30;break;
case10:num_month=31;break;
case11:num_month=30;break;
case12:num_month=31;break;
}
printf("\n星期日\t星期一\t星期二\t星期三\t星期四\t星期五\t星期六\n");
for(j=1;j<=(num+2)%7;j++)
printf("\t");
for(j=1;j<=num_month;j++)
{printf("%2d\t",j);
if((num+j-1+2)%7==6)printf("\n");
}
printf("\n");
}