Why does << operator cut off characters with cout?

Question

I am using std::getline in a while loop and printing the output with cout, I find that the beginnings of my line are being cut off when I am printing:

works as expected:

std::string line;
while(std::getline(csv, line)) {
 std::cout << line << std::endl
}

doesn't work as expected, cuts the first two characters out of my line

std::string line;
while(std::getline(csv, line)) {
 std::cout << line << "  " << std::endl
}

I've never noticed this behaviour before, why is it happening now?

Answer 1

This is what seems to be happening:
The characters at he the end of your line string contain carriage return character. In case your string was Hello World, printing it along with a carriage return would cause the cursor to go back at the H character. Which means when you start printing anything after that, it will overwrite your old string.
To avoid this you may want to print endl before anything else.