Pass by value-from bruce eckel
Hi all of you,
i was reading "thinking in c++" and found difficulties while comprehend the following
1.The calling code is responsible for cleaning the argument off the stack
doubt:how does calling code clean the passed argument
2.compiler knows everything there is to know about return value type because that type is built into the language,so the compiler can return it by placing it in register
doubt:how does the compiler knowledge about the return type is related with placing return value in register
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