How can I fix my program that subtracts angles?

Question

https://code.sololearn.com/Wb18OS2GJECx
The code can subtract angles so long as no negative angles are involved. How do I allow negative angles without the program having a stroke? Also, I'm a new programmer. What are some ways I can make my program more professional?

Answer 1

When compiling the angle subtract m/60, s/3600 rather than add them if angle is negative
Use the absolute value of the subtraction result to display deg min sec then just prepend the '-' sign if the ans is negative..
https://code.sololearn.com/WebXT2H4UtN6/?ref=app