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樓主  發(fā)表于: 2010-10-11 18:00
        本人是菜鳥(niǎo),請高手多多指教,在威綸通人機界面如何編寫(xiě)有加減乘除功能的計算器。
    本人試編寫(xiě)了不少次,有個(gè)難題總是無(wú)法解決,問(wèn)題如下:
     直接用計算器鍵盤(pán)畫(huà)面做為開(kāi)機畫(huà)面時(shí),計算功能正常,如用數值元件調用計算器鍵盤(pán)時(shí),只能輸入第一組計算數,且是直接顯示在數值元件上,按加減乘除鍵后,不能輸入另外一計算數,或者是直接退出鍵盤(pán)。
    一般計算器的要求是:按數值元件時(shí),彈出計算器畫(huà)面,輸入第一組計算數時(shí),先顯示在計算器畫(huà)面上,按加減乘除鍵后,可以輸入第二組計算數,也顯示在計算器畫(huà)面上,按等于后,退出計算器鍵盤(pán),并把計算結果顯示到數值元件上。

     請高手指點(diǎn)迷津,謝謝!
     本人郵箱是:jg90126@163.com

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