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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. const int DefaultSize = 10;
  5.  
  6. class Animal
  7. {
  8. public:
  9.     Animal(int);
  10.     Animal();
  11.     ~Animal() { }
  12.  
  13.     int GetWeight() const { return itsWeight; }
  14.     void Display() const { cout << itsWeight; }
  15.  
  16. private:
  17.     int itsWeight;
  18.  
  19. };
  20.  
  21. Animal::Animal(int weight): itsWeight(weight)
  22. { }
  23.  
  24. Animal::Animal(): itsWeight(0)
  25. { }
  26.  
  27. template <class T>
  28. class Array
  29. {
  30. public:
  31.     Array(int itsSize = DefaultSize);
  32.     Array( Array &rhs);
  33.     ~Array()
  34.     {
  35.         delete [] pType;
  36.     }
  37.  
  38.     Array& operator= (const Array&);
  39.     T& operator[] (int offset)
  40.     {
  41.         return pType[offset];
  42.     }
  43.  
  44.     int GetSize () const
  45.     {
  46.         return itsSize;
  47.     }
  48. template< class U >
  49. // friend 
  50. ostream& operator<< (ostream&, Array<U>&);
  51.  
  52. private:
  53.     T *pType;
  54.     int itsSize;
  55. };
  56.  
  57.  
  58. template <class T>
  59. ostream& operator<< (ostream& output, Array<T>& theArray)
  60. {
  61.     for (int i = 0; i < theArray.GetSize(); ++i)
  62.         {
  63.             output << "[" << i << "]" << theArray[i] << endl;
  64.         }
  65.     return output;
  66. }
  67.  
  68.  
  69. template <class T>
  70. Array<T>::Array(int size): itsSize(size)
  71. {
  72.     pType = new T[size];
  73.     for (int i = 0; i < size; ++i)
  74.         pType[i] = 0;
  75. }
  76.  
  77. //конструктор копирования
  78. template <class T>
  79. Array<T>::Array(Array &rhs)
  80. {
  81.     itsSize = rhs.GetSize();
  82.     pType = new T[itsSize];
  83.     for (int i = 0; i < itsSize; ++i)
  84.     {
  85.         pType[i] = rhs[i];
  86.     }
  87. }
  88.  
  89. //оператор присваения
  90. template <class T>
  91. Array<T>& Array<T>::operator= (const Array &rhs)
  92. {
  93.     if (this == &rhs)
  94.         return *this;
  95.  
  96.     delete [] pType;
  97.     itsSize = rhs.GetSize();
  98.     pType = new T[itsSize];
  99.  
  100.     for (int i = 0; i < itsSize; ++i)
  101.     {
  102.         pType[i] = rhs[i];
  103.     }
  104.  
  105.     return *this;
  106. }
  107.  
  108. ///////////////////////////////////////////////////////////////////
  109.  
  110. int main()
  111. {
  112.     bool Stop = false;
  113.     int  offset, value;
  114.     Array<int> theArray;
  115.  
  116.     while (!Stop)
  117.     {
  118.         cout << "Enter an offset (0-9) ";
  119.         cout << "and a value. (-1 to stop): ";
  120.         cin >> offset >> value;
  121.  
  122.         if (offset < 0)
  123.             break;
  124.  
  125.         if(offset > 9)
  126.         {
  127.             cout << "***Please use value between 0 and 9*** \n";
  128.             continue;    
  129.         }
  130.  
  131.         theArray[offset] = value;    
  132.     }
  133.     cout << "\n Here's the entire array: \n";
  134.     cout << theArray << endl;
  135.  
  136.  
  137.     return 0;
  138. }
Compilation error #stdin compilation error #stdout 0s 0KB
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3 2
-1 0
compilation info 
prog.cpp:50:41: error: ‘std::ostream& Array<T>::operator<<(std::ostream&, Array<U>&)’ must take exactly one argument
 ostream& operator<< (ostream&, Array<U>&);
                                         ^
stdout
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Standard output is empty
https://ideone.com/ZerZBl
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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