Sekvence za krmiljenje tiska

Primer izpisa

Primer izpisa

Understanding Operator Precedence

• # To start with, all the measurements will be in cm• # Assume that the roll of material is going to be 140cm wide• # and that the price per meter will be 5 units of currency• roll_width = 140• price_per_metre = 5• # Prompt the user to input the window measurements in cm• window_height = input('Enter the height of the window (cm): ')• window_width = input('Enter the width of the window (cm): ')• # Add a bit for the hems• # First we must convert the string into a number• # otherwise we will get an error if we try to perform arithmetic on a text

string• curtain_width = float(window_width) * 0.75 + 20• curtain_length = float(window_height) + 15• # Work out how many widths of cloth will be needed• # and figure out the total length of material for each curtain (in cm still)• widths = curtain_width / roll_width• total_length = curtain_length * widths• # Actually there are two curtains, so we must double the amount of material• # and then divide by 10 to get the number of meters• total_length = (total_length * 2) / 10• # Finally, work out how much it will cost• price = total_length * price_per_metre• # And print out the result• print("You need", total_length, "meters of cloth for ", price)

Making Choices

Sample