What do \t and \b do?

Question

I expect this simple line of code

printf(\"foo\\b\\tbar\\n\");

to replace \"o\" with \"\\t\" and to produce the following output

Answer 1

\t is the tab character, and is doing exactly what you're anticipating based on the action of \b - it goes to the next tab stop, then gets decremented, and then goes to the next tab stop (which is in this case the same tab stop, because of the \b.