用C语言写一个函数,给出年月日,计算该日是该年的第几天 用#include<ios...答:代码如下:include <iostream>using namespace std;int leap_year(int n){ if(n%400==0||(n%4==0 && n%100!=0)) return 1; else return 0;}int main(){ int year,month,day; int dayCount=0,i; int mon[]={31,28,31,30,31,30,31,31,30,31,30,31}...