// 第二十四章 异常和错误处理//1异常/*#include 
     
      using namespace std;class wrong{};void error(){   cout<<"出错"<
      
       using namespace std;const int num=5;class people{public:	people(int size=num);	people(const people&r);	~people(){delete []p; }	people&operator=(const people&r);	int &operator[](int off)const;	int GetSize()const{ return size;}	friend ostream&operator<<(ostream&, const people&);	class wrong{};private:	int *p;	int size;};people::people(int Size):size(Size){	//初始化指针p    p = new int[size];	for(int i=0; i
       
        =0 && off < _size){//如果值在正常范围内	     return p[off]; 	 }	 throw wrong();	 return p[0]; //返回}//重新友元输出符 friend ostream&operator<<(ostream&, const people&)//友元函数的定义不用加类名也不用在前面加班friendostream&operator<<(ostream& out, const people&r){	for(int i=0; i