Answer to Question #13558 in C++ for Ishaank

Question

int y = 5,x;
x = (++y)+ (++y);
cout<<x;
I would expect the value 13, but I got 14 as the output. any pointers?
what is funny is that the following code gives the value 13.

int y=5;
int x = (++y) + (++y);
cout<<x;
The difference lies in declaration....! so how does it matter?

Answer 1

In this example you could see error in the compiler implementation. It this case it's an ambiguity and about it was mentioned in most C++ tutorials.




In Java, where this error wasn't made, both parts of this code return the value of 13.