fork download 
  1. // Elaine Torrez                                         CS1A
  2. // ____________________________________________________________
  3. // 
  4. // DISPLAY STRING BACKWARD
  5. // ____________________________________________________________
  6. // This program prompts the user to enter a string and then 
  7. // displays the string in reverse order.
  8. // ____________________________________________________________
  9. // INPUT
  10. //   userStr   : The string entered by the user
  11. //
  12. // OUTPUT
  13. //   backward  : The string displayed backward
  14. // ____________________________________________________________
  15.  
  16. #include <iostream>
  17. using namespace std;
  18.  
  19. // FUNCTION PROTOTYPE
  20. void displayBackward(const char *str);
  21.  
  22. int main()
  23. {
  24.     /****************************************************
  25.      * VARIABLE DECLARATIONS
  26.      ****************************************************/
  27.     const int SIZE = 100;
  28.     char userStr[SIZE];     // INPUT string
  29.  
  30.     /****************************************************
  31.      * INPUT
  32.      ****************************************************/
  33.     cout << "Enter a string: ";
  34.     cin.getline(userStr, SIZE);
  35.  
  36.     /****************************************************
  37.      * OUTPUT
  38.      ****************************************************/
  39.     cout << "\nString backward: ";
  40.     displayBackward(userStr);
  41.     cout << endl;
  42.  
  43.     return 0;
  44. }
  45.  
  46. // *********************************************************
  47. // displayBackward
  48. // ---------------------------------------------------------
  49. // Displays all characters of a C-string in reverse order.
  50. // *********************************************************
  51. void displayBackward(const char *str)
  52. {
  53.     int length = 0;
  54.  
  55.     // Find the length of the string manually
  56.     while (str[length] != '\0')
  57.         length++;
  58.  
  59.     // Print characters from back to front
  60.     for (int i = length - 1; i >= 0; i--)
  61.         cout << str[i];
  62. }
  63.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin 
Gravity
stdout 
Enter a string: 
String backward: ytivarG
https://ideone.com/RPW6o0
language:
C++ (gcc 8.3)
created:
8 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!