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  1. #include <iostream>
  2. using namespace std;
  3. int a, b;
  4. void f(int &a, int b)
  5. {
  6.     int c = a;
  7.     a = b;
  8.     b = c;
  9. }
  10. void f2()
  11. {
  12.     f(b, a);
  13.     //int b = a - 1;
  14.     //f(a,b);
  15. }
  16. int main()
  17. {
  18.    a = 5;
  19.    b = 7;
  20.    f2();
  21.    cout << a << b;
  22.    return 0;
  23. }
  24.  
Success #stdin #stdout 0.01s 5304KB
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stdin
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5 7
stdout
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55
https://ideone.com/2pOsMt
language:
C++ (gcc 8.3)
created:
10 hours ago
visibility:
public

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