/************************************************************************
*        項(xiàng)目名稱:萬(wàn)年歷
*        項(xiàng)目描述:算法，判斷
*        項(xiàng)目環(huán)境:VS2013
*        生成日期:2020-3-8
*        作者所屬:追夢(mèng)
*************************************************************************/
#include<conio.h>
#include<stdio.h>
#include<stdlib.h>
int year, month, day;
int run[12] = { 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };//閏年
int ping[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };//平年
char weekday[7][10] = { "一", "二", "三", "四", "五", "六", "日" };//星期
void printStar()//打印
{
 printf("**************************************************\n");
}
void printBegin()//打印抬頭
{
 printf("\t\t萬(wàn)年歷\t\n");
 printStar();
 for (int i = 0; i < 7; i++)//打印星期
 {
 printf("%s\t", weekday[i]);
 }
 printf("\n");
}
//打印下面的日期，判斷當(dāng)前年份是平年還是閏年
int leap(int year)
{
 if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0)//閏年
 return 1;
 else if (year % 4 == 0 && year % 100 != 0 && year % 400 == 0)//閏年
 return 1;
 else
 return 0;//平年
}
//計(jì)算year離1900年有多少天
int daySum(int year,int month,int day,int run[],int ping[])
{
 //參照物1900-1-1-星期一（百度）
 int i, sum = 0;
 //計(jì)算年份天數(shù)，閏年+366，平年+365
 for( i = 1900; i < year;i++)
 {
 if (leap(i) == 1)
  sum += 366;
 else
  sum += 365;
 }
 
 for (i = 0; i < month-1; i++)//計(jì)算月份的天數(shù)
 {
 if (leap(year) == 1)
  sum += run[i];
 else
  sum += ping[i];
 }
 return sum;
}
//打印日歷
void printData(int sum, int year, int month)
{
 int result, temp, i; //result空格
 result = sum % 7;//前面的空格就是余數(shù)---->0-6
 //當(dāng)前月份空余的天數(shù)，空格表示
 for ( i = 0; i < result; i++)
 {
 printf("\t");
 }
 temp = 7 - result;//開(kāi)始打印1號(hào)
 if (leap(year) == 1)
 {
 //數(shù)組下標(biāo)是從0開(kāi)始，月份從一號(hào)開(kāi)始i=1
 for (i = 1; i <= run[month - 1]; i++)
 {
  printf("%d\t", i);
  if (i == temp || (i - temp) % 7 == 0)//換行
  printf("\n");
 }
 printf("\n");
 }
 else
 {
 for (i = 1; i <= ping[month - 1]; i++)
 {
  printf("%d\t", i);
  if (i == temp || (i - temp) % 7 == 0)//換行
  printf("\n");
 }
 printf("\n");
 }
}
int main()
{
 system("color 2f");//改變黑窗口的顏色
 printf("請(qǐng)輸入年 月 日：");
 scanf("%d%d%d", &year, &month, &day);
 int sum = daySum(year, month, day, run, ping);
 printBegin();
 printData(sum, year, month);
 
 system("pause");
 return 0;
}