#include <bits/stdc++.h> using namespace std; string jiafa(string s1, string s2) { string ans2 = ""; int t1, t2, ans1 = 0, up = 0; reverse(s1.begin(), s1.end()); reverse(s2.begin(), s2.end()); while (s1.length() != s2.length()) { if (s1.length() > s2.length()) s2 += '0'; else if (s1.length() < s2.length()) s1 += '0'; } cout << endl << s1 << endl << s2 << endl; for (int i = 0; i < s1.length() - 1; i++) { t1 = stoi(string(1, s1[i])); t2 = stoi(string(1, s1[i])); ans1 = t1 + t2 + up; if (ans1 >= 10) { ans1 %= 10; up = 1; } else up = 0; ans2 += static_cast<char>(ans1 + 48); } reverse(ans2.begin(), ans2.end()); return ans2; } int main() { string s1, s2; cin >> s1 >> s2; cout << jiafa(s1, s2); return 0; }纠正代码

下面是修改后的代码，主要是修正了变量t2的赋值错误，以及for循环中的终止条件错误：

#include <bits/stdc++.h>
using namespace std;

string jiafa(string s1, string s2) {
    string ans2 = "";
    int t1, t2, ans1 = 0, up = 0;
    reverse(s1.begin(), s1.end());
    reverse(s2.begin(), s2.end());
    while (s1.length() != s2.length()) {
        if (s1.length() > s2.length())
            s2 += '0';
        else if (s1.length() < s2.length())
            s1 += '0';
    }
    cout << endl << s1 << endl << s2 << endl;
    for (int i = 0; i < s1.length(); i++) {
        t1 = stoi(string(1, s1[i]));
        t2 = stoi(string(1, s2[i])); // 修改这里的赋值错误
        ans1 = t1 + t2 + up;
        if (ans1 >= 10) {
            ans1 %= 10;
            up = 1;
        } else
            up = 0;
        ans2 += static_cast<char>(ans1 + 48);
    }
    reverse(ans2.begin(), ans2.end());
    return ans2;
}

int main() {
    string s1, s2;
    cin >> s1 >> s2;
    cout << jiafa(s1, s2);
    return 0;
}