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/* Note:Your choice is C IDE */ #include "stdio.h" void screen(); void whatisit(); void leapyear(); void printyearday(); int IsLeapYear(int); int whatisita(int,int); int everymonth(int,int); void printmonth(int,int); void printmonthday(); char*week[]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"}; void main() { screen(); } void screen() { int n; while(1) { printf(" 万年历查询程序:\n"); printf("1.查询某年某月某日是星期几\n"); printf("2.查询某年是否是闰年 "); printf("3.打印某年的全年日历 "); printf("4.查询某月的最大天数 "); printf("5.退出 "); printf("My ID:2013304109\n"); printf("请输入要查询的选项:"); scanf("%d",&n); switch(n) { case 1:whatisit();break; case 2:leapyear();break; case 3:printyearday();break; case 4:printmonthday();break; case 5:return; default:printf("你输入错误，请按要求输入!!!\n");break; } } } void whatisit() { int y,m,d,s,k=1,sum,n,i; char yn; int a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31}; while(k) { printf("请依次输入年,月,日:\n"); scanf("%d,%d,%d",&y,&m,&d); s=0; for(i=1;i2)s=s+1; sum=s; n=(y-1+(y-1)/4-(y-1)/100+(y-1)/400+sum)%7; printf("这天是%s\n",week[n]); printf("是否继续查询(Y/N)?"); scanf("%c",&yn); getchar(); if(yn=='y'||yn=='Y')k=1; else k=0; } } int IsLeapYear(int year) {return (((year%4)==0 && (year%100)!=0) || ((year%400)==0));} void leapyear() { int y,k=1;char yn; while(k) { printf("请输入要查询的年份:\n"); scanf("%d",&y); if(IsLeapYear(y)) printf("是闰年!\n"); else printf("不是闰年!\n"); printf("是否继续查询(Y/N)?"); scanf("%c",&yn); getchar(); if(yn=='y'||yn=='y') k=1; else k=0; } } int whatisita(int y,int m) { int n,i,sum; int a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31},s=0; for(i=1;i2) s=s+i; n=(y-1+(y-1)/4-(y-1)/100+(y-1)/400+sum)&7; return n; } void printyearday() { int y,value,sum,i,k=1; char yn; while(k) { printf("请输入查询日历的年份\n:"); scanf("%d",&y); for(i=1;i<=12;i++) { printf("%d年%d月的信息:\n",y,i); value=whatisita(y,i); sum=everymonth(y,i); printmonth(value,sum); printf("\n"); } printf("是否继续查询(Y/N)?"); scanf("%c",&yn); getchar(); if(yn=='y'||yn=='y') k=1; else k=0; } } int everymonth(int year,int month) { int s,i; static int a[13]={0,31,28,31,30,31,30,31,31,30,31,30,31}; s=a[month]; if(IsLeapYear(year)&&month==2) s=s+i; return s; } void printmonthday() { int y,m,value,k=1;char yn; while(k) { printf("请输入查询的年份,月份\n:"); scanf("%d,%d",&y,&m); value=everymonth(y,m); printf("%d年%d月的最大天数为%d:\n",y,m,value); printf("%c",&yn);getchar(); if(yn=='y'||yn=='y') k=1; else k=0; } } void printmonth(int value,int sum) { int n,i=0,j; char*x[7]={"Sunday","Monday","Tuesday","Wenesday","Tursday", "Friday","Saturday"}; for(j=0;j<7;j++) { printf("%s",x[j]); } printf("\n"); while(i0) printf(" %d",n); else printf(" %d",n); n++; } }

总结：编写万年历这个程序的时候应注意把前面的/*自定义函数说明*/都写上，不然实现不了该相关程序的运行，另外万年历这个程序比较复杂，编写的时候应该要细心留意每一步的编写，细中求细。