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[Help] Nhờ mấy anh chị kiểm tra giùm e cái code này
Code:
// OOP-Giuaky2011.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <iostream>
using namespace std;
class ngay
{
private:
int dd,mm,yy;
public:
ngay()
{
dd=mm=yy=0;
}
~ngay()
{
}
ngay(int a,int b,int c)
{
dd=a;mm=b;yy=c;
}
friend istream &operator >>(istream &is,ngay &d);
friend ostream &operator <<(ostream &os,ngay &d);
int operator -(ngay a)
{
int kc=0;
kc=abs(yy-a.yy)*365;
int ngay1=dd-1+(mm-1)*30;
int ngay2=a.dd-1+(a.mm-1)*30;
kc=kc+abs(ngay1-ngay2);
return kc;
}
ngay operator +(int a)
{
ngay tamp;
switch(mm)
{
case 1: case 3: case 5: case 7: case 8: case 10: case 12:
{
if(dd<=31-a)
{
tamp.dd=dd+a;
tamp.mm=mm;
tamp.yy=yy;
}
else
{
if(mm==12)
{
tamp.dd=dd+a-31;
tamp.mm=1;
tamp.yy=yy+1;
}
else
{
tamp.dd=dd+a-31;
tamp.mm=mm+1;
tamp.yy=yy;
}
}
break;
}
case 4: case 6: case 9: case 11:
{
if(dd<=30-a)
{
tamp.dd=dd+a;
tamp.mm=mm;
tamp.yy=yy;
}
else
{
tamp.dd=dd+a-30;
tamp.mm=mm+1;
tamp.yy=yy;
}
break;
}
case 2:
{
if((yy%4==0&&yy%100!=0)||(yy%400)==0)
{
if(dd<=29-a)
{
tamp.dd=dd+a;
tamp.mm=mm;
tamp.yy=yy;
}
else
{
tamp.dd=dd+a-29;
tamp.mm=3;
tamp.yy=yy;
}
}
else
{
if(dd<=28-a)
{
tamp.dd=dd+a;
tamp.mm=mm;
tamp.yy=yy;
}
else
{
tamp.dd=dd+a-28;
tamp.mm=3;
tamp.yy=yy;
}
}
break;
}
}
return tamp;
}
ngay operator -(int a)
{
ngay tamp;
switch(mm)
{
case 1: case 2: case 4: case 6: case 8: case 9: case 11:
{
if(dd>=1+a)
{
tamp.dd=dd-a;
tamp.mm=mm;
tamp.yy=yy;
}
else
{
if(mm==1)
{
tamp.dd=dd-a+31;
tamp.mm=12;
tamp.yy=yy-1;
}
else
{
tamp.dd=dd-a+31;
tamp.mm=mm-1;
tamp.yy=yy;
}
}
break;
}
case 5: case 7: case 10:
{
if(dd>=1+a)
{
tamp.dd=dd-a;
tamp.mm=mm;
tamp.yy=yy;
}
else
{
tamp.dd=dd-a+30;
tamp.mm=mm-1;
tamp.yy=yy;
}
break;
}
case 3:
{
if((yy%4==0&&yy%100!=0)||(yy%400)==0)
{
if(dd>=1+a)
{
tamp.dd=dd-a;
tamp.mm=mm;
tamp.yy=yy;
}
else
{
tamp.dd=dd-a+29;
tamp.mm=2;
tamp.yy=yy;
}
}
else
{
if(dd>=1+a)
{
tamp.dd=dd-a;
tamp.mm=mm;
tamp.yy=yy;
}
else
{
tamp.dd=dd-a+28;
tamp.mm=2;
tamp.yy=yy;
}
}
break;
}
}
return tamp;
}
};
istream &operator >>(istream &is,ngay &d)
{
cout<<"Nhap ngay thang nam (dd/mm/yyyy)"<<endl;
cin>>d.dd; cin>>d.mm; cin>>d.yy;
return is;
}
ostream &operator <<(ostream &os,ngay &d)
{
cout<<"Ngay thang nam: ";
os<<d.dd<<"/"<<d.mm<<"/"<<d.yy<<endl;
return os;
}
void main()
{
ngay a(31,12,2010),b;
cin>>b;
cout<<a-b<<endl;
b=a+5;
b=a-4;
cout<<b;
system("pause");
}
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