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  1. // twotemps.cpp -- using overloaded template functions
  2. #include <iostream>
  3. template <typename T>     // original template
  4. void Swap(T &a, T &b);
  5.  
  6. template <typename T>     // new template
  7. void Swap(T *a, T *b, int n);
  8.  
  9. void Show(int a[]);
  10. const int Lim = 8;
  11. int main()
  12. {
  13.     using namespace std;
  14.     int i = 10, j = 20;
  15.     cout << "i, j = " << i << ", " << j << ".\n";
  16.     cout << "Using compiler-generated int swapper:\n";
  17.     Swap(i,j);              // matches original template
  18.     cout << "Now i, j = " << i << ", " << j << ".\n";
  19.  
  20.     int d1[Lim] = {0,7,0,4,1,7,7,6};
  21.     int d2[Lim] = {0,7,2,0,1,9,6,9};
  22.     cout << "Original arrays:\n";
  23.     Show(d1); 
  24.     Show(d2);
  25.     Swap(d1,d2,Lim);        // matches new template
  26.     cout << "Swapped arrays:\n";
  27.     Show(d1);
  28.     Show(d2);
  29.     // cin.get();
  30.     return 0;
  31. }
  32.  
  33. template <typename T>
  34. void Swap(T &a, T &b) 
  35. {
  36.     T temp;
  37.     temp = a;
  38.     a = b;
  39.     b = temp;
  40. }
  41.  
  42. template <typename T>
  43. void Swap(T a[], T b[], int n)
  44. {
  45.     T temp;
  46.     for (int i = 0; i < n; i++)
  47.     {
  48.         temp = a[i];
  49.         a[i] = b[i];
  50.         b[i] = temp;
  51.     }
  52. }
  53.  
  54. void Show(int a[])
  55. {
  56.     using namespace std;
  57.     cout << a[0] << a[1] << "/";
  58.     cout << a[2] << a[3] << "/";
  59.     for (int i = 4; i < Lim; i++)
  60.         cout << a[i];
  61.     cout << endl;
  62. }
  63.  
Success #stdin #stdout 0s 3468KB
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stdin
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Standard input is empty
stdout
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i, j = 10, 20.
Using compiler-generated int swapper:
Now i, j = 20, 10.
Original arrays:
07/04/1776
07/20/1969
Swapped arrays:
07/20/1969
07/04/1776
https://ideone.com/AzHnfm
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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