cpp2.cpp

来自「学习VC++的最基础程序」· C++ 代码 · 共 83 行

#include<iostream>
using namespace std;
int x=0;
class Date{
	int y;
	int m;
	int d;
public:
	void print(){cout<<d<<"日"<<m<<"月"<<y<<"年"<<endl;}
	void secondDay();
	void shezhi();
};
void Date::secondDay()
{
	if(m==2){
		if((y%4==0&&y%100!=0)||y%400==0){
			if(d==29){d=1;m=3;}
			else if(d<29)d+=1;
			else cout<<"error"<<endl;
		}
		else 
			if(d==28){d=1;m=3;}
			else if(d<28)
				d+=1;
			else cout<<"error"<<endl;
	}
	else 
		if(m<8&&m>=1){
			if(d==30+m%2){d=1;m+=1;}
			else if(d<30+m%2)
				d+=1;
			else cout<<"error"<<endl;
		}
		else 
			if(m>7&&m<=12){
				if(d==31-m%2){d=1;m+=1;}
				else if(d<31-m%2)
					d+=1;
				else cout<<"error"<<endl;
			}
			else cout<<"error"<<endl;
}
void Date::shezhi()
{
	cout<<"请输入当前日期（日，月，年）"<<endl;
	cin>>d>>m>>y;
	if(m==2){
		if((y%4==0&&y%100!=0)||y%400==0){
			if(d>29||d<1)
			{cout<<"error"<<endl;goto end;}
		}
		else 
			if(d>28||d<1)
			{cout<<"error"<<endl;goto end;}
	}
	else 
		if(m<8&&m>=1){
			if(d>30+m%2||d<1)
			{cout<<"error"<<endl;goto end;}
		}
		else 
			if(m>7&&m<=12){
				if(d>31-m%2||d<1)
				{cout<<"error"<<endl;goto end;}
			}
			else 
			{cout<<"error"<<endl;goto end;}
	x+=1;
end:
	x+=0;
}
int main()
{
	Date today;
	today.shezhi();
	if(x==1){
	today.print();
	today.secondDay();
	today.print();}
	else ;
	return 1;
}