数据结构C++（2）线性表——vector实现（vectorList）

抽象基类与异常处理

最新推荐文章于 2025-09-06 22:33:46 发布

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最新推荐文章于 2025-09-06 22:33:46 发布

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文章标签：数据结构与算法 c/c++

原文链接：http://www.cnblogs.com/peformer/p/8013115.html

本文介绍了抽象基类linearList的定义及其实现vectorList的具体内容，并定义了多种异常类来处理不同类型的错误，如非法参数值、非法索引等。

抽象基类的定义 linearList.h ：

 1 #pragma once
 2 #include <iostream>
 3 
 4 template<typename T>
 5 class linearList
 6 {
 7 public:
 8     virtual ~linearList() {};
 9     virtual bool empty() const = 0;
10     virtual int size() const = 0;
11     virtual T &get(int Index) const = 0;
12     virtual int indexOf(const T &theElement) const = 0;
13     virtual void erase(int theIndex) = 0;
14     virtual void insert(int theIndex, T &theElement) = 0;
15     virtual void output(std::ostream& out) = 0;
16 };

异常类的定义在 myExceptions.h 中：

  1 #pragma once
  2 // exception classes for various error types
  3 #include <string>
  4 
  5 using namespace std;
  6 
  7 // illegal parameter value
  8 class illegalParameterValue
  9 {
 10 public:
 11     illegalParameterValue(string theMessage = "Illegal parameter value")
 12     {
 13         message = theMessage;
 14     }
 15     void outputMessage() { cout << message << endl; }
 16 private:
 17     string message;
 18 };
 19 
 20 // illegal input data
 21 class illegalInputData
 22 {
 23 public:
 24     illegalInputData(string theMessage = "Illegal data input")
 25     {
 26         message = theMessage;
 27     }
 28     void outputMessage() { cout << message << endl; }
 29 private:
 30     string message;
 31 };
 32 
 33 // illegal index
 34 class illegalIndex
 35 {
 36 public:
 37     illegalIndex(string theMessage = "Illegal index")
 38     {
 39         message = theMessage;
 40     }
 41     void outputMessage() { cout << message << endl; }
 42 private:
 43     string message;
 44 };
 45 
 46 // matrix index out of bounds
 47 class matrixIndexOutOfBounds
 48 {
 49 public:
 50     matrixIndexOutOfBounds
 51     (string theMessage = "Matrix index out of bounds")
 52     {
 53         message = theMessage;
 54     }
 55     void outputMessage() { cout << message << endl; }
 56 private:
 57     string message;
 58 };
 59 
 60 // matrix size mismatch
 61 class matrixSizeMismatch
 62 {
 63 public:
 64     matrixSizeMismatch(string theMessage =
 65         "The size of the two matrics doesn't match")
 66     {
 67         message = theMessage;
 68     }
 69     void outputMessage() { cout << message << endl; }
 70 private:
 71     string message;
 72 };
 73 
 74 // stack is empty
 75 class stackEmpty
 76 {
 77 public:
 78     stackEmpty(string theMessage =
 79         "Invalid operation on empty stack")
 80     {
 81         message = theMessage;
 82     }
 83     void outputMessage() { cout << message << endl; }
 84 private:
 85     string message;
 86 };
 87 
 88 // queue is empty
 89 class queueEmpty
 90 {
 91 public:
 92     queueEmpty(string theMessage =
 93         "Invalid operation on empty queue")
 94     {
 95         message = theMessage;
 96     }
 97     void outputMessage() { cout << message << endl; }
 98 private:
 99     string message;
100 };
101 
102 // hash table is full
103 class hashTableFull
104 {
105 public:
106     hashTableFull(string theMessage =
107         "The hash table is full")
108     {
109         message = theMessage;
110     }
111     void outputMessage() { cout << message << endl; }
112 private:
113     string message;
114 };
115 
116 // edge weight undefined
117 class undefinedEdgeWeight
118 {
119 public:
120     undefinedEdgeWeight(string theMessage =
121         "No edge weights defined")
122     {
123         message = theMessage;
124     }
125     void outputMessage() { cout << message << endl; }
126 private:
127     string message;
128 };
129 
130 // method undefined
131 class undefinedMethod
132 {
133 public:
134     undefinedMethod(string theMessage =
135         "This method is undefined")
136     {
137         message = theMessage;
138     }
139     void outputMessage() { cout << message << endl; }
140 private:
141     string message;
142 };

vectorList 类的定义 vectorList.h ：

  1 #pragma once
  2 #include <iostream>
  3 #include <sstream>
  4 #include <iterator>
  5 #include <string>
  6 #include <algorithm>
  7 #include <vector>
  8 #include "linearList.h"
  9 #include "myExceptions.h"
 10 
 11 
 12 template<typename T>
 13 class vectorList : public linearList<T>
 14 {
 15 public:
 16 //    vectorList() = default;
 17     vectorList(int initSize = 10);
 18     vectorList(const vectorList<T> &cVectorList);
 19     ~vectorList();
 20     bool empty() const;
 21     int size() const;
 22     T &get(int Index) const;
 23     int indexOf(const T &theElement) const;
 24     void erase(int theIndex);
 25     void insert(int theIndex, T &theElement);
 26     void output(std::ostream& out);
 27 
 28     int capacity() const { return element->capacitp(); }
 29 protected:
 30     void checkIndex(int theIndex) const;
 31     std::vector<T> *element;
 32 };
 33 
 34 template<typename T>
 35 vectorList<T>::vectorList(int initSize)
 36 {
 37     if (0 > initSize)
 38     {
 39         std::ostringstream s;
 40         s << "initSize = " << initSize << "must > 0" << endl;
 41         throw illegalParameterValue(s.str());
 42     }
 43     element = new vector<T>(initSize);
 44 }
 45 
 46 template<typename T>
 47 vectorList<T>::vectorList(const vectorList<T> &cVectorList)
 48 {
 49     element = new std::vector<T>(*cVectorList.element);
 50 }
 51 
 52 template<typename T>
 53 vectorList<T>::~vectorList()
 54 {
 55     delete element;
 56 }
 57 
 58 template<typename T>
 59 void vectorList<T>::checkIndex(int theIndex) const
 60 {
 61     if (theIndex < 0 || theIndex >= size())
 62     {
 63         std::ostringstream s;
 64         s << "theIndex = " << theIndex << "error !" << endl;
 65         throw illegalIndex(s.str());
 66     }
 67 }
 68 
 69 template<typename T>
 70 bool vectorList<T>::empty() const
 71 {
 72     return element->empty();
 73 }
 74 
 75 template<typename T>
 76 int vectorList<T>::size() const
 77 {
 78     return element->size();
 79 }
 80 
 81 template<typename T>
 82 T &vectorList<T>::get(int Index) const
 83 {
 84     checkIndex(Index);
 85     //return element[Index];
 86     return *(element->begin() + Index);
 87 }
 88 
 89 template<typename T>
 90 int vectorList<T>::indexOf(const T &theElement) const
 91 {
 92     int Index = -1;
 93     for (int i = 0; i < element->size(); i++)
 94     {
 95         if (*(element->begin() + i) == theElement)//(element[i] == theElement)
 96         {
 97             Index = i;
 98             break;
 99         }
100     }
101 
102     return Index;
103 }
104 
105 template<typename T>
106 void vectorList<T>::erase(int theIndex)
107 {
108     checkIndex(theIndex);
109     element->erase(element->begin() + theIndex);
110 }
111 
112 template<typename T>
113 void vectorList<T>::insert(int theIndex, T &theElement)
114 {
115     if (theIndex < 0 || theIndex > size())
116     {
117         std::ostringstream s;
118         s << "theIndex = " << theIndex << "error !" << endl;
119         throw illegalIndex(s.str());
120     }
121     element->insert(element->begin() + theIndex, theElement);
122 }
123 
124 template<typename T>
125 void vectorList<T>::output(std::ostream& out)
126 {
127     copy(element->begin(), element->end(), std::ostream_iterator<T>(out, " "));
128 }
129 
130 template<typename T>
131 std::ostream &operator<<(std::ostream &cout, vectorList<T> &cVectorList)
132 {
133     cVectorList.output(cout);
134     return cout;
135 }