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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. void exchange (int & lhs, int & rhs) {
  5.  int temp = lhs;
  6.  lhs = rhs;
  7.  rhs = temp;
  8. }
  9.  
  10.  
  11.  
  12. int main() {
  13. 	int value = 21;
  14.     exchange (value, 42);
  15.     cout << value << endl;
  16. 	return 0;
  17. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp: In function 'int main()':
prog.cpp:14:24: error: invalid initialization of non-const reference of type 'int&' from an rvalue of type 'int'
     exchange (value, 42);
                        ^
prog.cpp:4:6: note: in passing argument 2 of 'void exchange(int&, int&)'
 void exchange (int & lhs, int & rhs) {
      ^
stdout
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Standard output is empty
https://ideone.com/IlpDNb
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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