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  1. #include <iostream>
  2. #include <cassert>
  3. #include <cstdlib>
  4.  
  5. using namespace std;
  6.  
  7. template<typename T>
  8. class Array;
  9.  
  10. template<typename T>
  11. ostream & operator <<(ostream &, const Array<T> &);
  12.  
  13. template<typename T>
  14. istream & operator >>(istream &, Array<T> &);
  15.  
  16. template <class T> class Array {
  17.     friend ostream & operator << <>(ostream &, const Array<T> &);
  18.     friend istream & operator >> <>(istream &, Array<T> &);
  19. public:
  20.     Array(int = 10);
  21.     ~Array();
  22. private:
  23.     T *ptr; //указатель на 1й элемент
  24.     int size; //размер массива
  25.     //    static
  26. };
  27.  
  28. template <class T> Array<T>::Array(int arraySize) {
  29.     size = arraySize;
  30.     ptr = new T[size];
  31.     assert(ptr != 0); //завершить, если память не выделена
  32. }
  33.  
  34. template <class T> Array<T>::~Array() {
  35.     delete [] ptr;
  36. }
  37.  
  38. template <class T> istream& operator>> (istream& in,  Array<T>& x) {
  39.     for (int i = 0; i < x.size; ++i) {
  40.         in >> x.ptr[i];
  41.     }
  42.     return in;
  43. }
  44.  
  45. template <class T> ostream& operator << (ostream & out, const Array<T> &x) {
  46.     for (int i = 0; i < x.size; ++i) {
  47.         out << x.ptr[i] << " ";
  48.  
  49.     }
  50.     return out;
  51. }
  52.  
  53. int main() {
  54.     Array<int> a(5);
  55.     cin >> a;
  56.     cout << a;
  57.  
  58.     return 0;
  59. }
  60.  
Success #stdin #stdout 0s 3432KB
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https://ideone.com/8KttXe
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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