C++異常階層

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  1 #define _CRT_SECURE_NO_WARNINGS  2 #include <iostream>  3   4 using namespace std;  5   6 class MyArray  7 {  8 public:  9     MyArray(int len); 10     ~MyArray(); 11  12 public: 13     int & operator[](int index); 14     int getlen(); 15  16 public: 17     class eSize 18     { 19     public: 20         eSize(int len) 21         { 22             size = len; 23         } 24         virtual void printfErr() 25         { 26             cout << "size:" << size <<endl; 27         } 28     protected: 29         int size; 30     private: 31     }; 32  33     class eNegative : public eSize 34     { 35     public: 36         eNegative(int size):eSize(size) 37         { 38             ; 39         } 40         virtual void printfErr() 41         { 42             cout << "eNegative 異常 size:" << size << endl; 43         } 44     protected: 45     private: 46     }; 47     class eZero : public eSize 48     { 49     public: 50         eZero(int size):eSize(size) 51         { 52             ; 53         } 54         virtual void printfErr() 55         { 56             cout << "eZero 異常 size:" << size << endl; 57         } 58     protected: 59     private: 60     }; 61     class eTooBig : public eSize 62     { 63     public: 64         eTooBig(int size):eSize(size) 65         { 66             ; 67         } 68         virtual void printfErr() 69         { 70             cout << "eTooBig 異常 size:" << size << endl; 71         } 72     protected: 73     private: 74     }; 75     class eTooSmall : public eSize 76     { 77     public: 78         eTooSmall(int size):eSize(size) 79         { 80             ; 81         } 82         virtual void printfErr() 83         { 84             cout << "eTooSmall 異常 size:" << size << endl; 85         } 86     protected: 87     private: 88     }; 89  90  91 protected: 92 private: 93     int *m_space; 94     int m_len; 95 }; 96  97  98  99 MyArray::MyArray(int len)100 {101     if (len < 0)102     {103         throw eNegative(len);104     }105     else if (len == 0)106     {107         throw eZero(len);108     }109     else if (len > 1000)110     {111         throw eTooBig(len);112     }113     else if (len < 3)114     {115         throw eTooSmall(len);116     }117 118     m_len = len;119     m_space = new int[len];120 }121 122 MyArray::~MyArray()123 {124     if (m_space != NULL)125     {126         delete[]m_space;127         m_space =  NULL;128         m_len = 0;129     }130     131 }132 int& MyArray::operator[](int index)133 {134     return  m_space[index];135 }136 int MyArray::getlen()137 {138     return m_len;139 }140 141 int main(void)142 {143     try144     {145         MyArray a(1);146         for (int i=0; i<a.getlen(); i++)147         {148             a[i] = i+1;149             printf("%d ", a[i]);150         }151     }152     catch (MyArray::eSize& e)153     {154         e.printfErr();155     }156 157     catch (...)158     {159         ;160     }161 162 163 164     cout << "Hello World!" << endl;165     system("pause");166     return 0;167 }

 

C++異常階層