fork(11) download
copy 
  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. void showArray(int arr[], int n)
  6. {
  7.     for(int i = 0; i < n; i++) cout << arr[i] << " ";
  8.     cout << endl;
  9. }
  10. void someFunction(int x[], int n) // changes the original values
  11. {
  12.     x[0] = 2;
  13.     x[1] = 1;
  14.     x[2] = 0;
  15. } 
  16. void someFunction2(int * x, int n)
  17. {
  18.     x[0] = 2;
  19.     x[1] = 1;
  20.     x[2] = 0;
  21. } // changes the original values
  22. int someFunction3(int x[], int n)
  23. {
  24.     x[0] = 2;
  25.     x[1] = 1;
  26.     x[2] = 0;
  27.     return 0;
  28. } // changes the original values
  29. int someFunction4(int x[], int n)
  30. {
  31.     x = new int[n];
  32.     std::cout << x << endl;
  33.     x[0] = 2;
  34.     x[1] = 1;
  35.     x[2] = 0;
  36.     return 0;
  37. } // does NOT change the original value
  38.  
  39. int main(void)
  40. {
  41.     int * y = new int[3];
  42.     y[0] = 0;
  43.     y[1] = 1;
  44.     y[2] = 2;
  45.     showArray(y, 3);
  46.  
  47.     std::cout << y  << endl;
  48.  
  49.     someFunction4(y, 3) ;
  50.     std::cout << y << endl;
  51.  
  52.     showArray(y, 3);
  53.     return 0;
  54. }
Success #stdin #stdout 0.02s 2812KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
0 1 2 
0x943b008
0x943b018
0x943b008
0 1 2
https://ideone.com/fyl6MX
language:
C++ (gcc 8.3)
created:
11 years 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!