ACM Coder [T1002] 一直wrong answer，不知道为什么。上代码！就对就对！

#include <stdio.h>
#include <stdbool.h>
#define arrayLength 20
#define bitMax 1000

main(){
    char inputA[arrayLength][bitMax];
    char inputB[arrayLength][bitMax];
    char result[arrayLength][bitMax + 1];
    int caseCount = 0;
    scanf_s("%d", &caseCount);
    for (int i = 0; i < caseCount; i++){

        scanf_s("%s", &inputA[i][0], 1000);
        scanf_s("%s", &inputB[i][0], 1000);
    }
    //Calculating... result[0],result[1]
    for (int caseNum = 0; caseNum < caseCount; caseNum++)
    {
        char *ptrA, *ptrB, *ptrResult;
        ptrA = inputA[caseNum];
        ptrB = inputB[caseNum];
        ptrResult = result[caseNum];
        int lengthA = getLengh(ptrA);
        int lengthB = getLengh(ptrB);
        int lengthMax = lengthA>lengthB ? lengthA : lengthB;
        //Fill A or B with zero
        if (lengthA > lengthB){
            ptrB += lengthB;
            for (int j = 0; j <= lengthB; j++)
            {
                char temp = *ptrB;
                *(ptrB + lengthA - lengthB) = temp;
                ptrB--;
            }
            ptrB = inputB[caseNum];
            for (int i = 0; i < lengthA - lengthB; i++){
                *ptrB = ‘0‘;
                ptrB++;
            }
        }
        else
        {
            ptrA += lengthA;
            for (int j = 0; j <= lengthA; j++)
            {
                char temp = *ptrA;
                *(ptrA + lengthB - lengthA) = temp;
                ptrA--;
            }
            ptrA = inputA[caseNum];
            for (int i = 0; i < lengthB - lengthA; i++){
                *ptrA = ‘0‘;
                ptrA++;
            }
        }
        for (int i = 0; i <= lengthMax; i++){
            *ptrResult = ‘0‘;
            ptrResult++;
        }
        *ptrResult = ‘\0‘;
        bool goAhead = false;
        ptrA = &inputA[caseNum][lengthMax - 1];
        ptrB = &inputB[caseNum][lengthMax - 1];
        ptrResult--;
        //Calculate result[i]
        for (int i = 0; i < lengthMax; i++)
        {

            int bitA = *ptrA - ‘0‘;
            int bitB = *ptrB - ‘0‘;
            *ptrResult = ‘0‘ + (bitA + bitB + goAhead) % 10;
            if (bitA + bitB + goAhead >= 10){
                goAhead = true;
            }
            else
            {
                goAhead = false;
            }
            ptrA--;
            ptrB--;
            ptrResult--;
        }
        if (goAhead == true){
            *ptrResult = ‘1‘;
        }
        else
        {
            ptrResult++;
        }
        ptrA++;
        ptrB++;
        for (int bitNum = 0; bitNum < lengthA; bitNum++){
            if (*ptrA == ‘0‘)
                ptrA++;
            else
            {
                break;
            }
        }
        for (int bitNum = 0; bitNum < lengthB; bitNum++){
            if (*ptrB == ‘0‘)
                ptrB++;
            else
            {
                break;
            }
        }
        printf("Case %d:\n%s + %s = %s\n\n", caseNum + 1, ptrA, ptrB, ptrResult);

    }
}

//get string length
int getLengh(char *ptr){
    int length = 0;
    while (*ptr != ‘\0‘)
    {
        ptr++;
        length++;
    }
    return length;
}