convert a char* to std::string

I need to use an std::string to store data retrieved by fgets(). To do this I need to convert the char* return value from fgets() into an std::string to store in an array. How can this be done?

std::string has a constructor for this (see constructor (7)):

const char *s = "Hello, World!";
std::string str(s);

Note that this constructor deep-copies the character list at s, and s should not be nullptr; otherwise, the behavior is undefined.

Stack Overflow Q#1195675, score: 531