Specific functions vs many Arguments vs context dependent

Question

An Example

Suppose we have a text to write and could be converted to \"uppercase or lowercase\", and can be printed \"at left, center or right\".

Specific

Answer 1

I prefer the argument way.

Because there's going to be some code that all the different scenarios need to use. Making a function out of each scenario will produce code duplication, which is bad.

Instead of using an argument for each different case (toUpper, centered etc..), use a struct. If you need to add more cases then you only need to alter the struct:

typedef struct {
    int toUpper;
    int centered;
    // etc...
} cases;
write( char *str , cases c ){//..}