| 摘要 |
<p>PURPOSE:To prevent any misoperation by discriminating any selection can not be executed at a glance by controlling a decimal point key so as not to operate the decimal point key after instructing the decimal point key once in the case of inputting a series of numerical values with respective keys in a tabletop electronic calculator equipped with a numeral key, computing element key, decimal point key and input information display part. CONSTITUTION:In the tabletop electronic calculator equipped with the numeral keys 76, computing element keys 74, decimal point key 75 and input information display part 73, in the case of inputting a series of numerical values by these respective keys 73-76, the decimal point key 75 is controlled so as not to operate the decimal point key 75 after instructing the decimal point key 75 once. Namely, when there is no meaning even by depressing the decimal point key 75, the decimal point key 75 or a figure positioning key 78 is prevented from being operated. Thus, when the decimal point key 75 is depressed once, any selection can not be executed while pushing a series of numerals, and such a state is made visible. Therefore, the misoperation of the user can be prevented.</p> |
