c语言编写万年历~~速度

/*c语言编程万年历
要求输入年月，判断是否闰年；
输入年月日，判断星期几；
输入年份，打出12个月的月历；
输入年份，月份，打印出本月日历；
要求用多个函数实现。*/
#include<stdio.h>
#include<time.h>
#include<string.h>int calendar[12][6][7];/*月历*/
char* week[]={"sunday","monday","tuesday","wednesday","thursday","friday","satarday"};
char* monthname[]={"january","february","march","april","may","june","july",
"august","september","october","november","december"};
int monthday[]={31,28,31,30,31,30,31,31,30,31,30,31};
char* menu[]={/*操作菜单*/
"1.input a year number,check whether it's a leap year.\n",
"2.input year,month,day,check the weekday.\n",
"3.input year,month,output the calendar of that month.\n",
"4.input year,output all the month calendar.\n",
"0.exit.\n"
};/*判断参数year传递的年份是否是闰年*/
int **leapyear(int year)
{
if(!(year%4)&&year%100||!(year%400)) return 1;
else return 0;
}/*输入年月日，判断星期几，利用zeller公式w=y+[y/4]+[c/4]-2c+[26(m+1)/10]+d-1
w是结果星期数，y是年份的后两位，c是年份的前两位，m是月份，3≤m≤14，也就是当
m≤2时，要算到前一年的13月份和14月份，最后要将w对7取模
*/
int weekday(int year,int month,int day)
{
int w,y,c,m,d;
c=year/100;
if(month<3){
m=12+month;
y=year%100-1;
}
else{
m=month;
y=year%100;
}
d=day;
w=y+y/4+c/4-2*c+26*(m+1)/10+d-1;
return (w%7+7)%7;
}/*输入年份，月份，打印出本月的日历*/
void monthly(int year,int month)
{
int weekday,i,j;
if(month==2)
if(**leapyear(year)) monthday[1]+=1;
weekday=weekday(year,month,1);
printf("%s\n",monthname[month-1]);
printf("sun. mon. tue. wed. thu. fri. sat.\n");
for(i=1,j=weekday;i<=monthday[month-1];i++,j++){
calendar[month-1][j/7][j%7]=i;
}
for(i=0;i<6;i++){
for(j=0;j<7;j++)
{
if(calendar[month-1][i][j]==0) printf("%5c",' ');
else printf("%-5d",calendar[month-1][i][j]);
}
printf("\n");
}
}void allmonth(int year) /*输入年份，打印出12个月的月历*/
{
int i;
for(i=1;i<=12;i++){
monthly(year,i);
getch();/*按任意键继续执行*/
}
}void main(void)
{
int year,month,day,i,n,weekday;
memset(&calendar,sizeof(calendar),0); /*初始化月历*/
for(i=0;i<5;i++)
printf("%s",menu[i]);
while(1){
printf("please choose the menu:");
scanf("%d",&n);
printf("\n");
switch(n){
case 1:
printf("please input year:");
scanf("%d",&year);
if(**leapyear(year)) printf("\n%d ** leap year.\n",year);
else printf("%d **n't leap year.\n",year);
break;
case 2:
printf("please input year month day:");
scanf("%d%d%d",&year,&month,&day);
printf("\n");
weekday=weekday(year,month,day);
printf("that day ** %s\n",week[weekday]);
break;
case 3:
printf("please input year month,then it output a calendar of that month:");
scanf("%d%d",&year,&month);
printf("\n");
monthly(year,month);
break;
case 4:
printf("please input year,then it will output the calendar of that year:");
scanf("%d",&year);
printf("\n");
allmonth(year);
break;
case 0:
return;
default:
printf("the number you input ** invalid.\n");
break;
}
}
getch(); /*按任意键，程序退出*/
}这个程序是可用的~~希望能帮到你~~~