Interger.h
[cpp]
#ifndef _INTEGER_H_
#define _INTEGER_H_
class Integer
{
public:
Integer(int n);
~Integer();
Integer& operator++();
//friend Integer& operator++(Integer& i);
Integer operator++(int n);
//friend Integer operator++(Integer& i, int n);
operator int();
void Display() const;
private:
int n_;
};
#endif // _INTEGER_H_
Interger.cpp
[cpp]
#include "Integer.h"
#include
using namespace std;
Integer::Integer(int n) : n_(n)
{
}
Integer::~Integer()
{
}
Integer& Integer::operator ++()
{
//cout<<"Integer& Integer::operator ++()"<
++n_;
return *this;
}
//Integer& operator++(Integer& i)
//{
// //cout<<"Integer& operator++(Integer& i)"<
// ++i.n_;
// return i;
//}
Integer Integer::operator++(int n)
{
//cout<<"Integer& Integer::operator ++()"<
//n_++;
Integer tmp(n_);
n_++;
return tmp;
}
//Integer operator++(Integer& i, int n)
//{
// Integer tmp(i.n_);
// i.n_++;
// return tmp;
//}
Integer::operator int() //重载了类型转换运算符，返回int型
{
return n_;
}
void Integer::Display() const
{
cout<
}
01.cpp
[cpp]
#include "Integer.h"
#include
using namespace std;
int add(int a, int b)
{
return a + b;
}
int main(void)
{
Integer n(100);
n = 200;
n.Display(); //200
int sum = add(n, 100);
cout<
int x = n;//n.operator int()
int y = static_cast(n);
return 0;
}