c语言50分求助

Lucas530 @ 2023-10-06 12:16:19

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

string s;
int sum = 0;
int cnt = 0;

int main () {
    getline(cin, s);
    for(int i = 0; i < 13; i++){
        if(i == 1 || i == 5 || i == 11 || i == 12)
            continue;
        sum++;
        cnt += (int)(s[i] - 48) * sum;
    }
    cnt %= 11;
    if(cnt == 10){
        cnt = (char)cnt;
        cnt = 'X';
    }else
        cnt = (char)cnt;

    if(cnt == ((int)s[12] - 48)){
        cout << "Right";
        return 0;
    }
    s[12] = (char)(cnt + 48);
    cout << s;
    return 0;
} 

by wzt2012 @ 2023-10-06 12:52:20

@Lucas530 给个思路吧，你看看注释。

#include<bits/stdc++.h>
using namespace std;
string a; 
char mod[12] = "0123456789X"; //把余数全部存下来就不用多判断了 
int t = 0, j = 1;
int main(){
    std::cin >> a;
    for(int i = 0; i < 12; i ++){
        if(a[i] == '-') continue;
        t += (a[i] - 48) * j ++; //对前9位数字进行计算 
    }
    if(mod[t % 11] == a[12]) cout << "Right"; //判断余数是否等于识别码 
    else{
        a[12] = mod[t % 11];
        std::cout << a << endl;
    } //修正并输出 
    return 0;
}

by ArisakaMashiro @ 2023-10-06 12:54:37

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

string s;
int sum = 0;
int cnt = 0;
char com;

int main () {
    getline(cin, s);
    for(int i = 0; i < 13; i++){
        if(i == 1 || i == 5 || i == 11 || i == 12)
            continue;
        sum++;
        cnt += (int)(s[i] - 48) * sum;
    }
    cnt %= 11;
    if(cnt == 10){
        com = 'X';
    }else
        com = (char)cnt + 48;

    if(com == s[12]){
        cout << "Right";
        return 0;
    }
    s[12] = com;
    cout << s;
    return 0;
} 

@Lucas530