c++ - How does std::cin works? -

i int doing following:

int num; cin >> num; 

i string doing following:

string word; cin >> word; 

my question is: how cin conversion internally? ever output error if enter unexpected? example: "ɔool ʇǝxʇ ƃǝuǝɹɐʇoɹ oulıuǝ". safeguard cin uses?

i'm new c++

note >> operator. c++ provides ability define functions give functionality built-in operator. (note, cannot create new operators don't exist in language.) in particular case, >> operator has been overloaded use cin , either int or string. these functions carry out conversion. in case of int version, set error flag in cin if input cannot converted int.