Vending notes to a customer.

A cashpoint can dispense £20, £10 and £5 notes. It always dispenses the least number of notes for each withdrawal. For example, if the customer chose to withdraw £50 it would dispense 2x£20 notes and 1x£10 note.

The dispenser mechanism is an embedded system that receives the commands, “Wx”, “D20”, “D10” or “D5” as an input sequence from the main control unit. For example, £50 would be W50 D20 D20 D10.

Cashpoint

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Make

Write a program to output the minimum number of notes from an input value.

Success Criteria

Remember to add a comment before a subprogram, selection or iteration statement to explain its purpose.

Complete the subprogram called dispense that:

  1. Outputs the amount the user is withdrawing in the format “Wx” where x is a number.
  2. Outputs “D20”, “D10” or “D5” the correct number of times for the withdrawal.

Complete the main program so that:

  1. The user can input the amount they wish to withdraw as a whole number.

Typical inputs and outputs from the program would be:

Enter the amount to withdraw: £50
W50
D20
D20
D10

Enter the amount to withdraw: £75
W75
D20
D20
D20
D10
D5