[C++知识库]c++大整数加法实现

设计实现"HugeInteger"大整数类，实现大整数的加法，输入和输出功能。能够满足以下程序的运行

#include<iostream>
#include<array>
#include<string>
using namespace std;

class HugeInteger
{
private:
	int n[101];
public:
	HugeInteger();
	HugeInteger(int n1);
	HugeInteger(string n1);
	void printa();
	
	friend ostream& operator<<(ostream& os, const HugeInteger& n1);
	
	HugeInteger operator+ (const HugeInteger& n2)
	{
		HugeInteger temp;
		int temp1 = 0;
		int temp2 = 0;
		int judge = 0;
		for (int i = 100; i >= 0; i--)
		{
			temp1 = this->n[i] + n2.n[i] +temp2;
			judge = temp1 / 10;
			if (judge == 0)
			{
				temp2 = 0;
			}
			else
			{
				temp2 = 1;
			}
			temp.n[i] = temp1 % 10;
		}
		return temp;
	}
	
	HugeInteger operator+ (const int& n2)
	{
		HugeInteger temp;
		int temp1 = 0;
		int temp2 = 0;
		int temp3 = 1;
		int judge = 0;
		for (int i = 100; i >= 0; i--)
		{
			if ((n2 / temp3 % 10) != 0)
			{
				temp1 = this->n[i] + (n2 / temp3 % 10) +temp2;
				temp3 *= 10;
				judge = temp1 / 10;
				if (judge == 0)
				{
					temp2 = 0;
				}
				else
				{
					temp2 = 1;
				}
				temp.n[i] = temp1 % 10;
			}
			else
			{
				if (temp2 == 1)
				{
					temp.n[i] = this->n[i] + 1;
					temp2 = 0;
				}
				else
				{
					temp.n[i] = this->n[i];
				}
			}
		}
		return temp;

	}
	
	HugeInteger operator+ (const string& n3)
	{
		HugeInteger temp;
		int temp1 = 0;
		int temp2 = 0;
		int judge = 0;
		int n2[101] = { 0 };
		
		int len = n3.length() - 1, len1 = n3.length() - 1;
		for (int i = 100; i >= 100 - len1; i--)
		{
			n2[i] = int(n3[len]) - 48;
			len = len - 1;
		}
	
		for (int i = 100; i >= 0; i--)
		{
			temp1 = this->n[i] + n2[i] + temp2;
			judge = temp1 / 10;
			if (judge == 0)
			{
				temp2 = 0;
			}
			else
			{
				temp2 = 1;
			}
			temp.n[i] = temp1 % 10;
		}
		return temp;
	}
};

HugeInteger::HugeInteger()
{
	for (int i = 0; i <=100; i++)
	{ 
		this->n[i] = 0;
	}
}
HugeInteger::HugeInteger(int n1)
{
	for (int i = 0; i <= 100; i++)
	{
		this->n[i] = 0;
	}
	int temp = 1;
	for (int i = 100;(n1/temp)!=0; i--)
	{
		this->n[i] = n1/temp % 10;
		temp *= 10;
	}
}

ostream& operator<<(ostream& os,const HugeInteger& n1)
{
	int judge = 0;
	for (int i = 0; i <= 100; i++)
	{

		if (n1.n[i] == 0 && judge == 0)
		{
			continue;
		}
		else
			judge = 1;
		if (judge == 1)
		{
			os << n1.n[i];
		}
	}
	if (judge == 0)
	{
		os << 0;
	}
	return os;
}

HugeInteger::HugeInteger(string n1)
{
	for (int i = 0; i <= 100; i++)
	{
		this->n[i] = 0;
	}
	int temp = 1;
	int len=n1.length() - 1  ,  len1 = n1.length() - 1 ;	
	for (int i = 100; i >= 100 - len1; i--)
	{
		this->n[i] = int(n1[len]) - 48;
		len = len - 1;
	}
	
}

void HugeInteger::printa()
{
	int judge = 0;
	for (int i = 0; i <= 100; i++)
	{

		if(this->n[i] == 0 && judge == 0)
		{
			continue;
		}
		else
			judge = 1;
		if (judge == 1)
		{
			cout << n[i];
		}
	}
	if (judge == 0)
	{
		cout << 0;
	}
	cout << endl;
}


int main()
{
	HugeInteger n1(7654321);
	HugeInteger n2(7891234);
	HugeInteger n3("99999999999999999999999999999");
	HugeInteger n4("1");
	HugeInteger n5;
	HugeInteger n6("1234567");

	//n1.printa();
	//n2.printa();
	//n3.printa();
	//n6.printa();
	
	cout << "n1 is " << n1 << "\nn2 is " << n2
		<< "\nn3 is " << n3 << "\nn4 is " << n4
		<< "\nn5 is " << n5 << "\n\n";
	
	n5 = n1 + n2;
	cout << n1 << " + " << n2 << " = " << n5 << "\n\n";
	cout << n3 << " + " << n4 << "\n= " << (n3 + n4) << "\n\n";
	n5 = n1 + 9;
	cout << n1 << " + " << 9 << " = " << n5 << "\n\n";
	
	n5 = n2 + "10000";
	cout << n2 << " + " << "10000" << " = " << n5 << endl;
	
	return 0;
}