简易计算器是创达科技 陈仲库 设计制作的单片机仿真keilc实例，简单好用，目的是，练习键盘与显示。河南科技大学-Simple calculator is a scientific and technological Tatsu Chen library of single-chip design keilc simulation examples, easy-to-use, the purpose is to practice the keyboard and display. Henan U