长整数计算器，对任意长整数进行加减乘除运算-Long integer calculator, for any long integer addition and subtraction multiplication and division

问题描述：编程实现无符号超长整数的算术运算（加、减、乘、除）-Problem Descr iption: Programming unsigned long integer arithmetic operations (addition, subtraction, multiplication, and division)

Inverse Z Transform by Long Division

基于51设计的8位数码管计算器,能实现加减乘除取余根号平方等功能,另外还支持删除操作,这个程序里还有一个亮点就是采用了一个高级5x5键盘设计,支持长按短按和连续按功能,非常值得大家去学习!(Based on the 51-designed 8-digit digital tube calculator, it can realize the functions of addition, subtraction, multiplication and division, and the remai