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 1

Answer 1

You are going to read the printf(3) man page and come across the following:

Instead of a decimal digit string one may write "*" or "*m$" (for some decimal integer m) to specify that the field width is given in the next argument, or in the m-th argument, respectively, which must be of type int.