This would read in and ignore everything until
EOF. (you can also supply a second argument which is the character to read until (ex:
'\n' to ignore a single line).
Also: You probably want to do a:
std::cin.clear(); before this too to reset the stream state.
I would prefer the C++ size constraints over the C versions:
// Ignore to the end of file cin.ignore(std::numeric_limits<std::streamsize>::max()) // Ignore to the end of line cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n')