/* 判斷某一日期是當(dāng)年的第幾天*/在C語(yǔ)言的程序中如何編寫？

#include"stdio.h"

void main()

{

    int n,year,month,day,month_day_sum=0,sum,

        month_day[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};

    printf("請(qǐng)輸入\"年月日\(chéng)"\n");

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

    if(year%100!=0&&year%4==0||year%400==0) month_day[2]=29;

    if(day>31||day<1||month>12||month<1) printf("錯(cuò)誤");

    else

    {

        for(n=1;n<month;n++) month_day_sum+=month_day[n];

        sum=month_day_sum+day;

          printf("是%d年的第%d天\n",year,sum);

    }

}