大数加法 hdu 1002

换一种写法：

#include <iostream>
#include <cstring>
#include <cstdio>

using namespace std;
const int MAXN = 1010;

void Big_Number_Add(char* a, char* b)
{
	char c[MAXN];
	int i;

	while(*a == '0')
		a++;
	while(*b == '0')
		b++;
	int len1 = strlen( a );
	int len2 = strlen( b );

	memset(c, 0, sizeof(c));
	for (i = 0; i < len1 || i < len2; ++i)
	{
		if(i < len1)
			c[i] += a[len1 - 1 - i] - '0';
		if(i < len2)
			c[i] += b[len2 - i - 1] - '0';
		if(c[i] >= 10)
		{
			c[i+1] = c[i] / 10;
			c[i] %= 10;
		}
	}

	len1 = len1 > len2 ? len1 : len2;
	if(c[len1] > 0)
		printf("%d", c[len1]);
	for (i = len1 - 1; i >= 0; --i)
		printf("%d", c[i]);
}

int main()
{
	int kcase = 1;
	int T;
	char str1[MAXN], str2[MAXN];
	cin>>T;
	while (T--)
	{
		memset(str1, 0, sizeof(str1));
		memset(str2, 0, sizeof(str2));
		cin>>str1>>str2;
		cout<<"Case "<<kcase++<<":"<<endl;
		cout<<str1<<" + "<<str2<<" = ";
		Big_Number_Add(str1, str2);
		cout<<endl;
		if(T!=0)
			cout<<endl;
	}
	return 0;
}