Boolean in ifdef: is "#ifdef A && B" the same as "#if defined(A) && defined(B)"?

user_47154 0
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In C++, is this:

#ifdef A && B

the same as:

#if defined(A) && defined(B)

?

I was thinking it wasn't, but I haven't been able to find a difference with my compiler (VS2005).

c-preprocessor conditional-compilation c++
5 Answers

For those that might be looking for example (UNIX/g++) that is a little different from the OP, this may help:

`

#if(defined A && defined B && defined C)
    const string foo = "xyz";
#else
#if(defined A && defined B)
    const string foo = "xy";
#else
#if(defined A && defined C)
    const string foo = "xz";
#else
#ifdef A
    const string foo = "x";
#endif
#endif
#endif
#endif
user_51617020
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