7_2.cpp

《C++程序设计实验指导与实训》源代码

#include<iostream.h>
struct date{
	int year;
	int month;
	int day;
}date;
void main()
{
	int i,days;
	static int daymonth[13]={0,31,30,31,30,31,30,31,31,30,31,30,31};
	cout<<"请输入年、月、日："<<endl;
	cin>>date.year>>date.month>>date.day;
	days=0;
	for(i=1;i<date.month;i++)
		days+=daymonth[i];
	days+=date.day;
	if((date.year%4==0&&date.year%100!=0||date.year%400==0)
		&&date.month>=3)
		days+=1;
	cout<<date.month<<"月"<<date.day<<"日是"<<date.year<<"年的第"
		<<days<<"天";
}