std::endl in a string variable?

Question

Hi i want to save multiply lines in a string. I got a string logstring and i want to save multiplay error logs which i later can print in a txt file or as a console output.

Answer 1

To separate lines in a string you should use the new line escape character '\n'.

For example

std::string logstring;

//...

logstring += "Error Message 1 Date";
logstring += '\n';

logstring += "Error Message 2 Date";
logstring += '\n';

logstring += "Error Message 3 Date";
logstring += '\n';

As for std::endl then it is a function declared like

template 
basic_ostream& endl(basic_ostream& os);

It is a so-called stream manipulator. Fo example in this statement

std::cout << std::endl;

there is used operator << that accepts pointer to the function as an argument.

You can not concatenate a string with the function pointer std::endl and if you did this somehow it did not make sense.