c语言怎样计算天数,C语言怎样计算天数？

满意答案

yangdengbao

推荐于 2019.11.12

【程序1】：

main()

{

int day,month,year,sum,leap;

printf("\nplease input year,month,day\n");

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

switch(month)/*先计算某月以前月份的总天数*/

{

case 1:sum=0;break;

case 2:sum=31;break;

case 3:sum=59;break;

case 4:sum=90;break;

case 5:sum=120;break;

case 6:sum=151;break;

case 7:sum=181;break;

case 8:sum=212;break;

case 9:sum=243;break;

case 10:sum=273;break;

case 11:sum=304;break;

case 12:sum=334;break;

default:printf("data error");break;

}

sum=sum+day; /*再加上某天的天数*/

if(year%400==0||(year%4==0&&year%100!=0))/*判断是不是闰年*/

leap=1;

else

leap=0;

if(leap==1&&month>2)/*如果是闰年且月份大于2,总天数应该加一天*/

sum++;

printf("It is the %dth day.",sum);}

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