Almost. C++ is as close as possible to compatible with ANSI-C but no closer. In practice, the major difference is that C++ requires prototypes, and that 'f()' declares a function that takes no parameters, while ANSI-C rules state that 'f()' declares a function that takes any number of parameters of any type. There are some very subtle differences as well, like the sizeof a char literal being equal to the sizeof a char (in ANSI-C, sizeof('x') is the sizeof an int). Structure 'tags' are in the same namespace as other names in C++, but C++ has some warts to take care of backward compatibility here.
