Item 9. Equivalent Code?

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Difficulty: 5

Can subtle code differences really matter, especially in something as simple as postincrementing a function parameter? This Item explores an interesting interaction that becomes important in STL-style code .

1. Describe what the following code does:

    // Example 9-1 // f( a++ ); 

   Be as complete as you can about all possibilities.

2. What is the difference, if any, between the following two code fragments ?

    // Example 9-2(a) // f( a++ ); // Example 9-2(b) // f( a ); a++; 

3. In Question #2, make the simplifying assumption that f() is a function that takes its argument by value, and that a is an object of class type that has an operator++(int) with natural semantics. Now what is the difference, if any, between Example 9-2(a) and Example 9-2(b)?

I l @ ve RuBoard