Create a cash register that should be able to accept only $20, $10, $5, $2 and $1 bills. Given the charge and amount of money received return the change in each denomination that should be given from the cash register. Sometimes when the vendors couldn’t make exact change they would tell us they couldn’t make exact change. It’s safe to assume that all output will be printed to the command line, below are some examples of how it would be used.

start program, waiting for command.

> java Main ...

ready

show current state in total and each denomination: $Total #$20 #$10 #$5 #$2 #$1. for example $68 1 2 3 4 5 means: Total=$68 $20x1 $10x2 $5x3 $2x4 $1x5.

> show

$68 1 2 3 4 5

put bills in each denomination: #$20 #$10 #$5 #$2 #$1 (show current state).

> put 1 2 3 0 5

$128 2 4 6 4 10

take bills in each denomination: #$20 #$10 #$5 #$2 #$1 (show current state).

> take 1 4 3 0 5

$48 1 0 3 4 5

given amount.

show change in each denomination: #$20 #$10 #$5 #$2 #$1 (and remove money from cash register).

> change 8

0 0 1 1 1

> show

$40 1 0 2 3 4

show error if there is insufficient fund or no change can be made.

> change 97

sorry

exit program.

> quit

bye

You can just type this command at the root project folder to build it.

gradle build

Then you can navigate to the "build/libs" folder and execute the following JAR command line.

java -jar cash-register-X.X.X.jar