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  1.     #include <iostream>
  2.  
  3.     int fValue(int i) {
  4.         i = 10;
  5.     }
  6.  
  7.     int fRef(int& i) {
  8.         i = 42;
  9.     }
  10.  
  11.     int main() {
  12.         int i = 1;
  13.         std::cout << "main:i=" << i << "\n";
  14.         fValue(i);
  15.         std::cout << "after fValue i=" << i << "\n";  // unchanged
  16.         fRef(i);
  17.         std::cout << "after fRef i=" << i << "\n";  // prints 42
  18.     }
  19.  
Success #stdin #stdout 0s 3460KB
comments (?)
stdin 
Standard input is empty
stdout 
main:i=1
after fValue i=1
after fRef i=42
https://ideone.com/LMh0xw
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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