Casio Computer Co., Ltd.

Yoshinaga Katayama

Hiroshi Uejima

Akiko Muraki

Sachiko Hirata

An electronic device includes a display unit and a processor. The processor is configured to accept an input of numerical expression data including an input field-equipped function data with one or plural input fields; cause the display unit to display the numerical expression data and a cursor; move, upon accepting a first user operation, the cursor from one element to a next or previous element, the element being a constituent of numerical expression data; and move, upon accepting a second user operation when the cursor is present in the input fields, the cursor to an outside of the input field-equipped function data with the input fields.

Electronic device, mathematical expression display control method, and storage medium which stores mathematical expression control program

According to one embodiment, an electronic device including: a display unit; and a processor configured to: accept an input of numerical expression data comprising an input field-equipped function data with one or plural input fields; cause the display unit to display the numerical expression data and a cursor; move, upon accepting a first user operation, the cursor from one element to a next or previous element, the element being a constituent of numerical expression data; and move, upon accepting a second user operation when the cursor is present in the input fields, the cursor to an outside of the input field-equipped function data with the input fields.

When the intake input mode is set and a 2D function key, such as '&#x221a;{square root over ( )}' or 'a/b,' is operated in a state where the cursor has been moved to an arbitrary position on the formula displayed on the display unit of an electronic calculator, the range of the formula covered by the input 2D function (or to be calculated) is determined on the basis of the position of the cursor by recognizing a formula part sandwiched by parentheses or a chunk of the formula part of a function with parentheses, recognizing a chunk of a formula part of a 2D function, recognizing a chunk of a formula part with successive numerals and characters, and recognizing the position of an arithmetic symbol (&#x201c;+,&#x201d; &#x201c;&#x2212;,&#x201d; &#x201c;&#xd7;,&#x201d; or &#x201c;&#xf7;&#x201d;) or a delimiter (&#x201c;:&#x201d; or &#x201c;,&#x201d;). The determined range is taken in by the input 2D function.

Electronic calculator with a formula display function

A mathematical calculator where when a mixed fraction key is depressed, an integer part input area, a numerator input area, a denominator input area and a vinculum for a mixed fraction are displayed on a display screen. When a user depresses a '1' key of a numeric keypad, '1' is inputted and displayed to and on the integer part input area. When the user depresses a &#x201c;+&#x201d; operator key, a CPU prohibits the inputted &#x201c;+&#x201d; operator from being inputted and displayed to and on the integer part display area. When the user depresses the &#x201c;+&#x201d; operator key in a state in which &#x201c;(1&#x201d; is inputted and displayed to and on the integer part input area, the CPU allows the inputted &#x201c;+&#x201d; operator from being inputted and displayed to and on the integer part display area.

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Kawasaki, Japan

Yoshinaga Katayama