| 摘要 |
PROBLEM TO BE SOLVED: To provide a portable terminal device for IC card capable of further reducing the size the device main body by mounting only at least two keys in the case of realizing a so-called desk-top calculator. SOLUTION: When a desk-top calculator mode is set, a display part 2 first displays a numerical figure '0' as an initial value, next changes the displayed value '0→1→2→3→4→5→6→7→8→9→+→-→×→÷→=→C→0→...' each time of depressing a selecting key 3a and at the time of depressing an enter key 4 after depressing the key 3a, define-inputs a displayed value at the time. By repeating the operation of this key 3a and the key 4, plural digits of calculation data and data to be calculated for calculation are inputted every digit at one time and an arithmetic code is inputted to execute at least arithmetic operation by using this inputted calculation data and data to be calculated and the arithmetic code. |
