How to pass parameter n to printf("%nd", some_int);

Question

We all know in C-based languages, printf("%11d", some_int); means right align within an 11 character field, but what if I want to replace this constant 11 here with a dynamic variable, what am I gonna do ?

Answer 1

You can use the * character to specify the field width in its own argument:

printf("%*d", some_width, some_int);