[Freaksken]

TIL you can specify a variable width or precision by using an asterisk.

Код:

Width:
printf("%5d", 10);			//prints '   10'
printf("%*d", 5, 10);			//prints '   10'

printf("%5f", 3.1415926535);		//prints '    3.141592'
printf("%*f", 5, 3.1415926535);		//prints '    3.141592'

Precision:
printf("%.5f", 3.1415926535);		//prints '3.14159'
printf("%.*f", 5, 3.1415926535);	//prints '3.14159'

printf("%.5s", "abcdefghi");		//prints 'abcde'
printf("%.*s", 5, "abcdefghi");		//prints 'abcde'

This is useful in situations where you don't want to hardcode those values.