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Understanding C++ output and program semantics

This is a medium-difficulty code-reading question that tests your ability to trace execution through a C++ snippet and predict its output accurately. Questions of this type appear in technical interviews to verify that you understand the language's core semantics—operator precedence, variable scoping, control flow, and side effects—rather than relying on intuition or pattern matching.

To solve problems like this, you need to step through the code methodically: track variable assignments and mutations, understand how operators combine and evaluate, and account for any implicit type conversions or ordering guarantees. Common pitfalls include misreading operator precedence, overlooking side effects in expressions, or missing subtle differences in how the language handles initialization or scope.

• Operator precedence and associativity
• Variable scope and lifetime
• Expression evaluation order and side effects
• Type conversions and implicit casting