A string has a member function .c_str() which returns a pointer to its first element.
It returns a pointer to a null-terminated character array for our string:
#include <iostream> #include <string> int main() // w ww.j a va2 s. c om { std::string s = "Hello World."; std::cout << s.c_str(); }
This member function is of type const char* and is useful when we want to pass our std::string variable to a function accepting a const char* parameter.