d_12_1.cpp

C++应用教程原码,里面包含该书中有十三章内容的代码,详细具体

#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;

template <class Type>
class Array {
private:
	const int size;
	Type *buffer;
public:

	Array (int s)
	  :size(s)
	{ buffer = new Type[size];}
	
	int gLength()
	 {return size;}
	 
	Type& operator[ ](int n)        // ①下标符的重载函数
	{   if (n >= size || n<0)
			throw overflow();
		else  return buffer[n];        // ② 返回下标指定的字符
	}

	void disp()
	 {  for (int i=0;i<size;++i)
		  cout<<a[i];
	    <<endl;
	 }
};

class overflow {
public:
	overflow(){}
	void showReason()
	{ cout << "对不起，数组越界！";
	  cin.get(); //等待结束，以便调测程序，可以删除
	}
};

void main()
{	Array <int> array(10);
    try {
		for (int i=0; i<10; ++i)
			array[i] = 2*i;
		cout << "array [3] = "<< array [3]<<endl;
		array[3] = 38;
        cout << "array [3] = "<< array [3]<<endl;
		cout << array [10];
	}
	catch (overflow E)
	{
		E.showReason();
	}
}