...实验板上的矩阵键盘和显示器编写一个简单的计算器,要求能一位数和两...答:sccode=(sccode<<1)|0x01; //行扫描码左移一位 } } } return(0); //无键按下,返回值为0 } void display(void) //***显示程序***// {int i;uchar code rel[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe}; //数码管选通 uchar code led[]={0x7e,0x30,0x6...
Java程序编写一个计算器类,要求实现加、减、乘、除运算,注意在进行除 ...答:JButton bCancel; //清除按钮private JButton[] b=new JButton[16]; //构造按钮数组private char LastOp; //操作符号private boolean Countable; //用于判断是否可计算private String KeyLabel[]={"7","8","9","/","4","5","6","*","1","2","3","-","0","."...