C++相談室 part62 ..
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769:デフォルトの名無しさん
08/07/13 15:25:19
>Where an argument declared as size_t n specifies the length of the array for a
>function, n can have the value zero on a call to that function. Unless explicitly stated
>otherwise in the description of a particular function in this subclause, pointer arguments
>on such a call shall still have valid values, as described in 7.1.4. On such a call, a
>function that locates a character finds no occurrence, a function that compares two
>character sequences returns zero, and a function that copies characters copies zero
>characters.

0を渡すことはできるが、その場合でもNULLはダメらしい


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4790日前に更新/209 KB
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