C issues with extended ASCII characters

Question

I'm having trouble using variables in place of numeric values for characters in printf statements.

For example, printf("%c", 201) displays ╔ as I want it to but printf("%c", var) when var is of type char and var=201 displays ♫.

Anyone have any information as to what's going on?

Answer 1

In fact if there is no l modifer the argument is converted to unsigned char so that's why you didn't observe any change when you changed your variable types, what you actually need is

printf("%lc", var);

but in

signed char var = 201;

overflow indeed occurs, so you should be careful.