"正在从数组读取无效数据"

Question

大整数减法

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

int main()
{
    //设定变量两个输入数组，两个倒叙数组一个中间变量
    char arr1[200] = {}, arr2[200] = {}, larr1[200] = {}, larr2[200] = {};
    char exc[200] = {};
    cout << "请输入被减数" << endl;
    cin >> arr1;
    cout << "请输入减数" << endl;
    cin >> arr2;
    int len1 = strlen(arr1), len2 = strlen(arr2);
    int lenL1 = strlen(larr1), lenL2 = strlen(larr2);
    int i = 0, j = 0;
    //借位变量(标志变量)
    int b = 0;
    for (int i = 0; i < len1 ; i++)
    {
        larr1[i] = arr1[len1-1-i];
    }
    for (int j = 0; j < len2; j++)
    {
        larr2[j] = arr2[len2-1-j];
    }
    //减法运算，进位运算
    int m = 0;
    if (strcmp(larr1, larr2) == 0)
    {
        cout << 0;
    }
    else
    {
        for (m = 0; m < lenL1 ; m++)
        {
            if (larr1[m] > larr2[m])
            {
                exc[m] = larr1[m] - larr2[m] - b;
                b = 0;
            }
            else if (larr1[m] < larr2[m])
            {
                exc[m] = larr1[m] + 10 - larr2[m] - b;
                b = 1;
            }
        }

    }
    int k = 0;
    while (k < lenL1 )
    {
        cout << exc[k];
        k++;
    }
    return 0;
}

Answer 1

21、25行for循环后面的分号删掉