Friends make you fat?

What this C++ language-knowledge question tests

This is an easy language-knowledge question that asks you to trace through a C++ code snippet and predict its output. It rewards careful reading of syntax and understanding of how the compiler interprets declarations, scope, and potential runtime behavior on a 64-bit system.

To solve problems like this, you need to parse the code mentally, account for any implicit type conversions or memory layout quirks specific to 64-bit architectures, and recognize where undefined behavior or surprising output might occur. Even "simple" code can have non-obvious results if you miss a detail about operator precedence, variable scope, or pointer arithmetic.

• C++ syntax and operator precedence
• Type conversions and implicit coercions
• Memory layout on 64-bit systems
• Scope and variable binding