自定义异常类

来源：互联网发布：淘宝自动回复经典语句编辑：程序博客网时间：2024/06/05 19:58
#include <iostream>using namespace std;class MyArray{public:MyArray(int size);~MyArray();public:int & operator[](int index);int getLen();/*1） 抛出异常eNegative  2）index = 0 抛出异常 eZero  3）index>1000抛出异常eTooBig 4）index<10 抛出异常eTooSmall 5）eSize类是以上类的父类，*/class eSize{public:eSize(int size){m_size = size;}virtual void printS(){cout<<"eSize::size:"<<m_size<<endl;}protected:int m_size;};class eNegative:public eSize{public:eNegative(int size):eSize(size){cout<<"eNegative"<<endl;}void printS(){cout<<"eNegative::size:"<<m_size<<endl;}};class eZero:public eSize{public:eZero(int size):eSize(size){cout<<"eZero"<<endl;}void printS(){cout<<"eZero::size:"<<m_size<<endl;}};class eTooBig:public eSize{public:eTooBig(int size):eSize(size){cout<<"eTooBig"<<endl;}void printS(){cout<<"eTooBig::size:"<<m_size<<endl;}};class eTooSmall:public eSize{public:eTooSmall(int size):eSize(size){cout<<"eTooSmall"<<endl;}void printS(){cout<<"eTooSmall::size:"<<m_size<<endl;}};protected:private:int *m_space;int m_size;};MyArray::MyArray(int size){if (size<0){throw eNegative(size);} else if(size==0){throw eZero(size);}else if (size>1000){throw eTooBig(size);}else if(size<3){throw eTooSmall(size);}m_space = new int[size];m_size = size;}MyArray::~MyArray(){if (m_space!=NULL){delete[] m_space;m_size = 0;}}int & MyArray::operator[](int index){return m_space[index];}int MyArray::getLen(){return m_size;}int main(){try{MyArray a(2);for (int i =0;i<a.getLen();i++){a[i] = i+1;printf("a:%d\n",a[i]);}}catch (MyArray::eSize &e){e.printS();//cout<<e.<<endl;}catch (...){cout<<"未知异常"<<endl;}system("pause");return 0;}
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