How do I pad a printf to take account of negative signs and variable length numbers?

Question

I\'m trying to output some numbers in a log file and I want to pad a load of floats via the printf function to produce:

 058.0
 020.0
 038.0
-050.0
         


        

Answer 1

follows Erik, but I find

printf("% 6.1f\n", myVar);

also works.