基礎計算機

Puli_College 為工程師及工程科系學生發展一套計算機，分別為基礎計算機、科學計算機、統計計算機，以及解方程計算機。
本機為基礎型計算機，可進行加、減、乘、除四則運算，適合一般大眾使用。19個按鍵區分為五類，
(1) 數字鍵：1 2 3 4 5 6 7 8 9 0，及小數點 .。
(2) 四則運算建：+ - ╳ / 。
(3) 括號鍵：( )。
(4) 等號鍵：=，按下等號鍵即進行算式運算並顯示結果。
(5) 清除鍵：clear。欲進行下一則運算時，須先行按下清除鍵。
19個按鍵並非任何情況下皆有效，例如，右括號數不可多於左括號數，或一串數字中不可出現兩個小數點；於是，任何按鍵均區分為有效及無效兩種情況，有效按鍵顯示為較明亮之按鍵原色，無效按鍵顯示為較暗淡之半透明背景色。 Puli_College for engineers and engineering students to develop a computer department, were based computer, computer science, statistics, computer, computer and solving equations.
    This machine is based computer, you can add, subtract, multiply, divide four operations, for the general public. 19 keys divided into five categories,
(1) the number keys: 1,234,567,890, and the decimal point ..
(2) to build four operations: + - ╳ /.
(3) Bracket key :().
(4) equals key: =, namely, press the equals key formula calculates and displays the results.
(5) Clear key: clear. For the next arithmetic, the line must first press the Clear key.
    19 keys are not valid in any case, such a right can not be more than the number of brackets from the left parenthesis, or a string of numbers can not appear in two decimal points; thus, no keys are divided into valid and invalid both cases, the effective key appears as the brighter colors of the keys, invalid key appears as the translucent background color is dull.