i = 4, i++ + i should return 9, but returns 8

[NewsBot]

My C/C++ professor mentioned in class that many compilers cannot properly evaluate the expression i++ + i and some permutations of it, so I decided to test that out in Visual Studio with a small program:

 

#include

 

int main ( void )

{

 

*** int i = 4;

 

*** printf("%i", i++ + i);

 

*** return 0;

 

}

 

It returns 8. It should return 9. Why does it return 8?

 

 

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