据说杭电acm的题目是比较简单的。可是为什么Pro 1002提交总是Wrong Answer呢？代码如下：百思不得其解。先留着，以后回来再看。
题目：
http://acm.hdu.edu.cn/showproblem.php?pid=1002

#include<iostream>
using namespace std;

const int length = 1000;

void printArray(int *array, int l)
{
    int isZero = true;
    for(int temp = 0; temp < l; temp ++)
    {
        if(array[temp] == 0)
            isZero *= 1;
        else
            isZero *= 0;

        if(!isZero)
        {
            for(int i = temp; i < l; i ++)
                cout << array[i];
            break;
        }
    }
}

int main()
{
    int a[length];
    int al;
    int b[length];
    int bl;
    int sum[length];
    int line;
    int sl;
    char c;
    
    
    cin >> line;
    c = cin.get();

    for(int k = 0; k < line; k ++)
    {
        int i = 0;
        int j = 0;
        while(1)
        {
            c = cin.get();
            if((c != '\n') && (c != ' '))
                a[i ++] = int(c) - int('0');
            else
                break;
        }

        while(1)
        {
            c = cin.get();
            if((c != '\n') && (c != ' '))
                b[j ++] = int(c) - int('0');
            else 
                break;
        }

        al = i;
        bl = j;

        
        for(int k = 0; k <length; k ++)
            sum[k] = 0;

        sl = i>j ? i : j;

        int tag = 0;

        for(int k = sl; k >= 0; k --)
        {
            if(i > 0 && j > 0)
            {
                sum[k] = sum[k] + a[-- i] + b[-- j] + tag;
                tag = sum[k] / 10;
                sum[k] %= 10;
            }
            else if(i <= 0 && j > 0)
            {
                sum[k] = sum[k] + b[-- j] + tag;
                tag = sum[k] / 10;
                sum[k] %= 10;
            }
            else if( i > 0 && j <= 0)
            {
                sum[k] = sum[k] + a[-- i] + tag;
                tag = sum[k] / 10;
                sum[k] %= 10;
            }
            else
            {
                sum[k] = sum[k] + tag;
                tag = sum[k] / 10;
                sum[k] %= 10;
            }              
        }
        cout << "Case " << (k + 1) << ":" << endl;
        printArray(a, al);
        cout << " + ";
        printArray(b, bl);
        cout << " = ";
        printArray(sum, sl+1);
        cout << endl << endl;
    }
    
    return 0;
}