| 摘要 |
PURPOSE:To simplify correcting operation and check correcting function, by performing subtraction and addition correcting processing by - and + keys for correction when there is change in dealings. CONSTITUTION:When the amount of sales is inputted by pressing ten keys on a keyboard 2, flag FN is set to ''1'' (step 25). Under this condition, if cash transaction is changed to ticket transaction or ticket transaction is changed to cash transaction by some reason, an operator depresses a correction - key or a correction + key. Flag FCOR - or flag FCOR + is set to ''1''. When a cash key or a ticket key is depressed, setting state of above-mentioned flags is judged by CPU14 and addition or subtraction processing is performed. If the value of corrected amount register is ''0'', it is recognized that correction is performed normally, and correction is completed. |
