C++

同样可以AC

注意最高位进位情况

例如：999 999

#include <iostream>
#include <string>
#include <vector>
using namespace std;
void add(string num1, string num2){
    int len1, len2, maxLen;
    len1 = num1.size();
    len2 = num2.size();
    maxLen = max(len1, len2);
    vector<char> num1S;
    vector<char> num2S;
    // cout << len1 << " " << len2 << " " << maxLen << endl;
    for(int i = 0; i < maxLen - len1; i++){
        num1S.push_back('0');
    }
    for(int i = 0; i < maxLen - len2; i++){
        num2S.push_back('0');
    }
    string::iterator sit;
    for(sit = num1.begin(); sit != num1.end(); sit++){
        num1S.push_back(*sit);
    }
    for(sit = num2.begin(); sit != num2.end(); sit++){
        num2S.push_back(*sit);
    }
    // cout << num1S.size() << " " << num2S.size() << endl;
    vector<char> result(maxLen);
    vector<char>::reverse...