a_8_2.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;
class Sentence
{
	int length;
	string str;
public:
	int getlength(){return length;}
	Sentence(string i)
		:str(i)
	{	length=i.size();
	}
	char& operator [](int n)
	{   static char ch;
		if(n>length-1||n<0)
		{	cout<<"抱歉，数组下标越界！";
		    return ch;
		}
		else 
			return str[n];
	}
	void disp()
	 { cout<<str<<endl;}
};
void main()
{
	string aString("Iraq's interim government");
	Sentence word(aString);
	word.disp();
	cout<<"此语句含有的字符数："<<word.getlength()<<endl;
	cout<<endl;
	word[6]='_';
	word[14]='_';
	for(int i=0;i<aString.size()+1;i++)
		cout<<word[i];
	cin.get(); //等待结束，以便调测程序，可以删除
}