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Python Code

#CMYK to RGB Conversion Algorithm - www.101computing.net/cmyk-to-rgb-conversion-algorithm

def menu():
  print("################################")
  print("#                              #")
  print("#      CMYK/RGB Convertor      #")
  print("#                              #")
  print("################################")
  print("")
  option=""
  while option!="3":
    print("To convert from CYMK to RGB press 1")
    print("To convert from RGB to CMYK press 2")
    print("To exit press 3")
    option = input("Your choice?")

    if option=="1":
      CMYK_to_RGB()
    elif option=="2":  
      RGB_to_CMYK()
    elif option=="3":
      print("Good bye!")
      break
    else:
      print("Invalid option, try again!")

def CMYK_to_RGB():
  print("You selected CMYK to RGB Conversion")
  #Add code to retrieve user inputs (C,M,Y,K)
  c = int(input("Cyan:"))
  m = int(input("Magenta:"))
  y = int(input("Yellow:"))
  k = int(input("Black:"))
  
  #Apply Conversion formulas
  r = int(255 * (1-c/100) * (1-k/100))
  g = int(255 * (1-m/100) * (1-k/100))
  b = int(255 * (1-y/100) * (1-k/100))
  
  #Output R,G,B values
  print("Red: " + str(r))
  print("Green: " + str(g))
  print("Blue: " + str(b))
  print("-------------------------------")
    
def RGB_to_CMYK():
  print("You selected RGB to CMYK Conversion")
  #Add code to retrieve user inputs (R,G,B)
  r = int(input("Red: "))
  g = int(input("Green: "))
  b = int(input("Blue: "))
  
  #Apply Conversion formulas
  if r>=b and r>=g:
    k = 1 - r/255
  elif g>=r and g>=b:
    k = 1 - g/255
  else:
    k = 1 - b/255  
  
  c = (1 - r/255 - k) / (1 - k)
  m = (1 - g/255 - k) / (1 - k)
  y = (1 - b/255 - k) / (1 - k)
  
  #Output C,M,Y,K values
  print("Cyan: " + str(int(c*100)) + "%")
  print("Magenta: " + str(int(m*100)) + "%")
  print("Yellow: " + str(int(y*100)) + "%")
  print("Black: " + str(int(k*100)) + "%")
    
#Main Program Starts here
menu()