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  1.     #include <iostream>
  2.     using namespace std;
  3.  
  4.     // 'const' means *you* can't change the value
  5.     // It does not mean the value cannot change
  6.  
  7.     void f(const int& x, int* y)
  8.     {
  9.         cout << "x = " << x << endl;
  10.         *y = 5;
  11.         cout << "x = " << x << endl;
  12.     }
  13.  
  14.     int main()
  15.     {
  16.         int x = 10;
  17.         f(x, &x);
  18.     }
  19.  
Success #stdin #stdout 0.01s 2680KB
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stdin
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Standard input is empty
stdout
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x = 10
x = 5
https://ideone.com/3NzrYK
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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