C语言计算指定日期后n天是什么日期和计算指定日期在一年中的天数

浅浅的花香味﹌ 2022-02-27 23:34 479阅读 0赞

话不多说 直接上代码

#include<stdio.h>
    #include<stdlib.h>
     
    int main()
    {
       int year,month,day;
       int leapyear=0;
       int daytime=0;
       int sum;
       int index=0;
       static int month_date[12]={31,28,31,30,31,30,31,31,30,31,30,31};
       printf("请输入日期:");
       scanf("%d-%d-%d",&year,&month,&day);
       printf("请输入天数:");
       scanf("%d",&daytime);
       sum=daytime+day;
    	if(month==2)
    	   	{	
    	   		if(year%400==0||(year%100!=0&&year%4==0))
    			{
    				leapyear=1;
    				month_date[month-1]+=leapyear;//如果是闰年则2月加一天
    			}
    			else
    			{
    				month_date[month-1] = 28;//如果不是闰年，则二月置为28天
    			}
    	   		printf("%d年的二月份是：%d天\n",year,month_date[month-1]);
    	   	}
      	for(int i=0;i<month;i++ ){
    	  	index +=month_date[month-1];
    	  }
    	  index +=day;//计算天数 
     	printf("该日期是第%d天\n",index);
     	
       do
       {	
    	   	if(month==2)
    	   	{	
    	   		if(year%400==0||(year%100!=0&&year%4==0))
    			{
    				leapyear=1;
    				month_date[month-1]+=leapyear;
    			}
    			else
    			{
    				month_date[month-1] = 28;
    			}
    	   		printf("%d年的二月份是：%d天\n",year,month_date[month-1]);
    	   	}
    	   	if(sum>month_date[month-1])
    	   	{
    	   		sum-=month_date[month-1];
    	   		month++;
    	   		if(month==13)
    	   		{
    	   			year++;
    	   			month=1;
    	   		}
    	   	}
       } while(sum>month_date[month-1]);
       day=sum;
       printf("\n第%d天后是%d-%d-%d",daytime,year,month,day);
       return 0;
    }