Starting from the very beginning with C++, here is that famous chestnut (filename is test.cpp):
int main () { std::cout << "Hello, world!"; std::cout << std::endl; return 0; }
And immediately I'm scratching my head at weirdness on the command line in Leopard. There is a difference between gcc and g++. Why? It seems the linker is having trouble finding libstdc++. Now I have to remember to use g++.
$ g++ -o test test.cpp $ ./test Hello, world! $ gcc -o test test.cpp Undefined symbols: ... ... "std::cout", referenced from: __ZSt4cout$non_lazy_ptr in ccJ7ynTQ.o ld: symbol(s) not found collect2: ld returned 1 exit status