Question

When I printf a char with %c format and the char is unprintable like ‘\0’ then there is no column of printout. Same if I use %1c. Or %1.1c. Is there a way to force printf to output a column for ‘\0’?

I’m doing some large printf’s and I want columns to match up.

Answer 1

There is nothing you can do for printf. But you can use isprint to filter the arguments of printf

printf("%c", (isprint(c) ? c : ' ' ));