Draw an activity diagram for a cold dink (soda, cola, juice, milkshake, ice tea) selling machine. The machine works as follows: The machine can powered on or off. If it is powered on then initially it is idle (do nothing just LCD screen displaying date. When someone wants to buy a drink he/she can enter drink code. Valid codes are: 1000: Soda, 1001:Cola, 1002: juice, 1004:milkshake, 1005: ice tea. After selecting the drink a user can insert coins while inserting coins the total will be displayed on the LCD. When enough coins have been inserted the machine will release the drink . Acceptable coin units are:1, 2, 5, and 10. The price of drinks depends on the drink code. If inserted coins are not enough and the user is not inserting more coins, the machine will wait for 5 seconds and then display the message "insert more coins" if the inserted coins are enough the machine will release the selected drink. If more coins are inserted the machine will return the change and release the drink. If an error is detected the "service needed" message will be displayed and coins will be returned. Assume that there are always drinks in the machine. It can not be empty. The user can cancel the process at anytime Before the machine releases the drink. In that case the machine will return the coins. In the case that you find the above description lacks some more necessary information, write down your assumptions and solve the problem based on that
Draw an activity diagram for a cold dink (soda, cola, juice, milkshake, ice tea) selling machine. The machine works as follows:
The machine can powered on or off. If it is powered on then initially it is idle (do nothing just LCD screen displaying date. When someone wants to buy a drink he/she can enter drink code. Valid codes are: 1000: Soda, 1001:Cola, 1002: juice, 1004:milkshake, 1005: ice tea. After selecting the drink a user can insert coins while inserting coins the total will be displayed on the LCD. When enough coins have been inserted the machine will release the drink . Acceptable coin units are:1, 2, 5, and 10. The price of drinks depends on the drink code. If inserted coins are not enough and the user is not inserting more coins, the machine will wait for 5 seconds and then display the message "insert more coins" if the inserted coins are enough the machine will release the selected drink. If more coins are inserted the machine will return the change and release the drink. If an error is detected the "service needed" message will be displayed and coins will be returned.
Assume that there are always drinks in the machine. It can not be empty.
The user can cancel the process at anytime Before the machine releases the drink. In that case the machine will return the coins.
In the case that you find the above description lacks some more necessary information, write down your assumptions and solve the problem based on that.
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