getline(cin, aString) receiving input without another enter

Question

My code looks like this,

string aString;
cin >> aString;
cout << \"This is what cin gets:\" << aString << endl;
getline(cin, aString)         


        

Answer 1

this is what I get:

std::string str;
std::cin >> str;  //hello world
std::cout << str;  //hello

this is because the stream operator tokenizes on white space

std::string str;
std::getline(std::cin, str);  //hello world
std::cout << str;  //hello world

you get the full line, getline() works until it find the first end of line and returns that value as a string.

However when tokenizing, if there are characters (for example a '\n') left in the stream then these will be accessed when getline is called, you will need to clear the stream.

std::cin.ignore();