How to parse a string to an int in C++?

Question

What\'s the C++ way of parsing a string (given as char *) into an int? Robust and clear error handling is a plus (instead of returning zero).

Answer 1

In the new C++11 there are functions for that: stoi, stol, stoll, stoul and so on.

int myNr = std::stoi(myString);

It will throw an exception on conversion error.

Even these new functions still have the same issue as noted by Dan: they will happily convert the string "11x" to integer "11".

See more: http://en.cppreference.com/w/cpp/string/basic_string/stol