I’ve seen many times code like this:
void func(){
#define a ...
...
#undef a
}
Is the #undef necessary at all?
I’ve seen many times code like this: void func(){ #define a … … #undef
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I’ve seen many times code like this:
void func(){
#define a ...
...
#undef a
}
Is the #undef necessary at all?
It is not necessary, but the scope of a
#defineis global after the line it was defined. It will not obey the function scope, if you are thinking it will.