【正文】
nd function from its point of view, a single chip is actually a puter. This design is the use of MSC51 microcontroller to design the fourdigit calculator, using C programming language to achieve calculator functions. 4X4 external keyboard, the keyboard scan to finish by the number of control values and make the drive circuit to the cathode results in a total of sevensegment digital tube display properly, and has cleared at any time to plete key calculation and display clear. Calculator to plete an integer from 0 to 9999 plus / minus / multiply / divide. Implementation of the process is as follows: Power is displayed 0, waiting type value, when the input numbers, will e out through the digital display, the input +,,*,/ operator, the calculator in the internal implementation of the numerical conversion and storage, and wait for the reenter the value, when Type the value in the type of value will be displayed by an equal sign will be displayed in the digital control operation results. Key words: SCM calculator keyboard scan C language。畢業(yè)論文題目：基于單片機(jī)的電子計(jì)算器專(zhuān)業(yè)：電子與信息工程系 摘要近年來(lái)隨著計(jì)算機(jī)在社會(huì)領(lǐng)域的滲透和大規(guī)模集成電路的發(fā)展，單片機(jī)的應(yīng)用正在不斷地走向深入，由于它具有功能強(qiáng)，體積小，功耗低，價(jià)格便宜，工作可靠，使用方便等特點(diǎn)，因此特別適合于與控制有關(guān)的系統(tǒng)，越來(lái)越廣泛地應(yīng)用于自動(dòng)控制，智能化儀器，儀表，數(shù)據(jù)采集，軍工產(chǎn)品以及家用電器等各個(gè)領(lǐng)域，作為微型機(jī)的一個(gè)主要分支，單片機(jī)在結(jié)構(gòu)上的最大特點(diǎn)是把CPU、RAM和ROM存儲(chǔ)器