134.异常类的处理

异常类 1 #pragma once 2 #include <initializer_list> 3 using namespace std; 4 5 class memerror 6 { 7 }; 8 9 class outerror 10 { 11 }; 12 13 class safeintarray 14 { 15 private: 16 int *p; 17 int n; 18 19 public: 20 safeintarray(int length); 21 safeintarray(initializer_list<int> mylist); 22 safeintarray(); 23 int &operator [](int num); 24 ~safeintarray(); 25 };

 

1 #include "safeintarray.h" 2 3 4 5 safeintarray::safeintarray(int length) 6 { 7 if (length <= 0) 8 { 9 throw memerror(); 10 } 11 this->p = new int[length] {0}; 12 this->n = length; 13 } 14 15 safeintarray::safeintarray(initializer_list<int> mylist) 16 { 17 } 18 19 safeintarray::safeintarray() 20 { 21 } 22 23 int & safeintarray::operator[] (int num) 24 { 25 // TODO: 在此处插入 return 语句 26 if (num<0 || num>this->n - 1) 27 { 28 throw outerror(); 29 } 30 31 return this->p[num]; 32 } 33 34 35 safeintarray::~safeintarray() 36 { 37 }

 

main.cpp 1 #include <iostream> 2 #include "safeintarray.h" 3 using namespace std; 4 5 void main() 6 { 7 try 8 { 9 safeintarray s1(5); 10 11 cout << s1[5] << endl; 12 } 13 catch(outerror e) 14 { 15 cout << "内存分配错误" << endl; 16 } 17 catch (memerror e) 18 { 19 cout << "越界" << endl; 20 } 21 22 cin.get(); 23 }

 

转载于:https://www.cnblogs.com/xiaochi/p/8686100.html