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  1. #include <iostream>
  2. using namespace std;
  3.  
  4.     void dontEdit(int a) {
  5.        a = 2;
  6.     }
  7.  
  8.     void edit(int &a) {
  9.        a = 2;
  10.     }
  11.  
  12.     int main() {
  13.         int a = 5;
  14.         cout << "a is: " << a << endl;
  15.         dontEdit(a);
  16.         cout << "a is: " << a << endl;
  17.         edit(a);
  18.         cout << "a is: " << a << endl;
  19.         return 0;
  20.     }
Success #stdin #stdout 0s 3456KB
comments (?)
stdin 
Standard input is empty
stdout 
a is: 5
a is: 5
a is: 2
https://ideone.com/QppH0q
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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