#define _CRT_SECURE_NO_WARNINGS#include<stdio.h>#include<string.h>int main(){    char str1[255], str2[255];    int num1[255] = { 0 }, num2[255] = { 0 };//用于存放加数，且较短者补前导零    int sum[255] = { 0 };    int length1, length2, length;    int i, j;    gets(str1);    gets(str2);    length1 = strlen(str1);    length2 = strlen(str2);    length = length1 > length2 ? length1 : length2;    //将两个加数存入到num[]中    for (i = length - 1,j = length1 - 1; j >= 0; i--,j--)    {        num1[i] = str1[j] - ‘0‘;    }    for (i = length - 1, j = length2 - 1; j >= 0; i--, j--)    {        num2[i] = str2[j] - ‘0‘;    }    //从后往前进行加法计算    for (i = length - 1; i >= 0; i--)    {        sum[i] = sum[i] + num1[i] + num2[i];        if ((sum[i] >= 10) && (i != 0))        {            sum[i] = sum[i] - 10;            sum[i - 1]++;//表示进位        }    }    for (i = 0; i < length; i++)    {        printf("%d", sum[i]);    }    return 0;}