Redl1ght_S @ 2023-10-10 21:36:26

by Redl1ght_S @ 2023-10-10 21:44:57

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

int ctoi(char a){
    int b = a - '0'; // b = 1;
    return b;
}

int solve(void){
    int nowdigit = 1;
    long long modSum = 0;
    for(char c : s){
        if(c == '-'){
            continue;
        }else{
            modSum += nowdigit * ctoi(c);
            nowdigit++;
            if(nowdigit > 9){
                return modSum % 11;
            }
        }
    }
    return 0;
}

int main(){
    stringstream ansISBN;
    cin >> s;
    int ID = solve();
    if(s[12] == ID || (s[12] == 'X' && ID == 10)){
        cout << "Right" << endl;
    }else{
        for(int i=1; i<=12; i++){
            if(i == 12){
                cout << ansISBN.str() << "-" << ID << endl;
                return 0;
            }
            ansISBN << s[i-1];
        }
    }
}

改成这个b样子