Question

Possible Duplicate:
“C subset of C++” -> Where not ? examples?

I am aware that C is a subset of C++ (i.e. there does not exist valid C code that is not valid C++ code). My question is whether g++ is completely compatible with all C code. For example, will

g++ -o testing test.c

produce an identical binary to

gcc -o testing test.c

in all circumstances?

More specifically, if they do not always create identical binaries, is there any reason that that could be a problem? Is it safe to always use g++ if I’m not sure about the code?

Answer 1

C is not a subset of C++.

Try:

foo.c

int main() {
    int class = 0;
    return 0;
}

Anyway have fun here: Where is C not a subset of C++?