bignum.h

构造大数运算类 +；-；*；/ 并测试。<br>1. 不考虑括号 <br>2. 输入数据最大长度为40 位,要捕获异常 <br>3. 不考虑输入小数部分,<b

#include <iostream>
#include "bug.h"
#include <string>
using namespace std;
class BigNum
{
public:
	BigNum(){};
	BigNum(string x);
	~BigNum(){}
	void Input();
	void Output();
	BigNum& Erase_Zero();
	BigNum Add(BigNum&x);
	BigNum operator+(BigNum&x);
	BigNum Sub(BigNum &x);
	BigNum operator-(BigNum&x);
	BigNum Big_Small(BigNum&x);
	BigNum Mul(BigNum&x);
	BigNum operator*(BigNum&x);
	BigNum Div(BigNum &x,bool T);
	BigNum operator/(BigNum&x);
protected:
private:
	string  str;  
};