| 摘要 |
PURPOSE:To improve the quality of electronic apparatus such as a cash register by presetting key code + or - to a function key. CONSTITUTION:For the purpose of presetting paying-in key C1 of function key group 1 to a - code, key C1 is depressed to make AND gate 2 operation-state, and continuously, a - key is depressed to store the - code in code storage unit 4 through OR gate 3 and gate 2. Similarly, payment key C0, check key CC and deposit key D are preset to the + code, and the + code is stored in storage units 7, 10 and 13. Then, when information of numeric values of the amount of money is inputted from an input means, arithmetic operation is performed in arithmetic processing part 16 by the indication of keys C0 to D and is displayed on 22 and is printed on 25. Simultaneously, addition and subtraction are performed in 32 on a basis of stored + and - codes, and the result is displayed on 22 and printed on 25. As a result, the difference amount of payment can be displayed wihtout calculating dependent upon manual operation. |
