C语言写的日历程序

#include

#include

int main()

{

/*定义部分*/

//定义年月(a,b)

int nYear,nMonth,nWeek,d,e,nDays,s;

printf("请输入年份:");

scanf("%d",&nYear);

//闰年情况

if((nYear % 4==0 && nYear % 100!=0) || (nYear % 400==0))

{

printf("输入的年份为闰年\n");

d=0;

}

//平年情况

else

{

printf("输入的年份为平年\n");

d=1;

}

printf("请输入月份:");

scanf("%d",&nMonth);

//闰年

if(d==0)

{

switch(nMonth)

{

case 1:e=5,nDays=31;

break;

case 2:e=1,nDays=29;

break;

case 3:e=2,nDays=31;

break;

case 4:e=5,nDays=30;

break;

case 5:e=0,nDays=31;

break;

case 6:e=3,nDays=30;

break;

case 7:e=5,nDays=31;

break;

case 8:e=1,nDays=31;

break;

case 9:e=4,nDays=30;

break;

case 10:e=6,nDays=31;

break;

case 11:e=2,nDays=30;

break;

case 12:e=4,nDays=31;

break;

default:

printf("非法的月份\n"),exit (0);

}

}

//平年

if(d==1)

{

switch(nMonth)

{

case 1:e=6,nDays=31;

break;

case 2:e=2,nDays=28;

break;

case 3:e=2,nDays=31;

break;

case 4:e=5,nDays=30;

break;

case 5:e=0,nDays=31;

break;

case 6:e=3,nDays=30;

break;

case 7:e=5,nDays=31;

break;

case 8:e=1,nDays=31;

break;

case 9:e=4,nDays=30;

break;

case 10:e=6,nDays=31;

break;

case 11:e=2,nDays=30;

break;

case 12:e=4,nDays=31;

break;

default:

printf("非法的月份\n"),exit (0);

}

}

int i=nYear - (nYear / 100 * 100);

s = (((i/4)+i)%7+e+1)%7;

switch(s)

{

case 0:nWeek=7;//周日

break;

case 1:nWeek=1;//周一

break;

case 2:nWeek=2;//周二

break;

case 3:nWeek=3;//周三

break;

case 4:nWeek=4;//周四

break;

case 5:nWeek=5;//周五

break;

case 6:nWeek=6;//周六

break;

}

/*打印部分*/

char ci[7] = " ";//4个空格

int ni[31];

int g , k = 1;

for(g = 0 ; g

{

ni[g] = g + 1;

}

printf("\t %4d年%2d月\n一 二 三 四 五 六 日\n",nYear,nMonth);

for(g = 1 ; g

{

printf("%s",ci);

k++;

}

for(g = 0 ; g

{

printf("%-6d",ni[g]);

if(k % 7 == 0) printf("\n");

k++;

}

printf("\n");

system("pause");

return 0;

}