C语言程序设计 万年历程序

#include"stdio.h"

int mon_day[]={31,28,31,30,31,30,31,31,30,31,30,31};

int judge(int year,int month)

{

if(month==1||month==3||month==5||month==7||month==8||month==10||month ==12)

return(1);

else if(month==2)

{

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

return(2);

else return(3);

}

else return(4);

}

void show2()

{

int year,i,j,a,n,m,k;

char ** p;

char * week[]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};

char*month[]={"January","February","March","April","May","June","July","Augu st","September","October","November","December"};

printf("please inter the year:");

scanf("%d",&year);

printf("\n");

printf("the calendar of the year%d.",year);

printf("\n");

a=(year+(year-1)/4-(year-1)/100+(year-1)/400)%7;

for(i=0;i<12;i++)

{

n=judge(year,i+1);

p=month+i;

printf("%s\n",*p);

printf("\n");

for(j=0;j<7;j++)

{p=week+j;

printf("%6s",*p);}

printf("\n");

for(k=0;k

printf(" ");

for(m=1;m<32;m++)

{

printf("%6d",m);

if((a+m)%7==0)

printf("\n");

if(n==1&&m==31) break;

else if(n==2&&m==28) break;

else if(n==3&&m==29) break;

else if(n==4&&m==30) break;

}

a=(a+m)%7;/*计算出下个月的第一天是星期几*/

printf("\n");

printf("**************************************************");

printf("\n");

}

}

void show()

{

printf("******************************\n");

printf("1.某年某月某日是星期几\n2.是否闰年\n3.某年某月的最大天数\n4.打印该月日历\n5.退出\n");

printf("******************************\n");

}

int show1(int y,int m,int d)

{int i,R,sum=0;

for(i=0;i

sum=sum+mon_day[i];

sum=sum+d;

if((y%4 == 0 &&y%100 != 0)||(y%400 == 0)&&m>2)

sum=sum+1;

R=(5+(y+1)+(y-1)/4-(y-1)/100+(y-1)/400+sum)%7;

if(R==0)

R=7;

return R;

}

int leap(int y)

{

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

return 1;

else

return 0;

}

int max_day(int y,int m)

{int X;

if(leap(y)==1&&m==2)

X=29 ;//printf("该年该月最大天数:29");

else

X=mon_day[m-1];//printf("%d",mon_day[m-1]);

return X;

}

void main()

{

int year,month,day,i;

F:

show();

printf("请选择：");

scanf("%d",&i);

switch(i)

{

case 1:

printf("请输入年、月，日：");

scanf("%d%d%d",&year,&month,&day);

printf("%d-%d-%d是星

期%d\n",year,month,day,show1(year,month,day));break;

case 2:

printf("请输入年份：");

scanf("%d",&year);

if(leap(year)==1)

printf("该年是闰年.\n");