Using a variable with the same name in different spaces

Question

This code compiles, but I have a run time error in Visual Studio:

Run-time check failure #3 - the variable \'x\' is being used without being initializ

Answer 1

When you declare a new variable, its name becomes visible right here

int x =
//     ^- there

because it is at that point the variable is fully declared, and as such; its name means something. At this point in time any other (previously declared variable) in a surrounding scope will be hidden.