我hu了，什么数据，四个零？？？

加上判断N==0就过，之前四个UKE

#include <iostream>
#include <set>
#include <algorithm>
#include <cstring>
using namespace std;

int main() {
    int a[101][2];
    memset(a, 0, sizeof a);
    int N;
    cin >> N;
    //if (N == 0)
    //  return 0;
    string str;
    cin >> str;
    for (int i = 1; i <= N; i++) {
         a[i][0]=str[i-1]-'0';
         a[i][1] = 1;
    }
    for (int i = 1; i <= 5; i++) {
        for (int j = 1; j <= N; j++) {
            switch (a[j][0]) {
            case 0:
                switch (a[j][1]) {
                case 1:
                    cout << "XXX";
                    break;
                case 2:
                    cout << "X.X";
                    break;
                case 3:
                    cout << "X.X";
                    break;
                case 4:
                    cout << "X.X";
                    break;
                case 5:
                    cout << "XXX";
                    break;
                }
                break;
            case 1:
                switch (a[j][1]) {
                case 1:
                    cout << "..X";
                    break;
                case 2:
                    cout << "..X";
                    break;
                case 3:
                    cout << "..X";
                    break;
                case 4:
                    cout << "..X";
                    break;
                case 5:
                    cout << "..X";
                    break;
                }
                break;
            case 2:
                switch (a[j][1]) {
                case 1:
                    cout << "XXX";
                    break;
                case 2:
                    cout << "..X";
                    break;
                case 3:
                    cout << "XXX";
                    break;
                case 4:
                    cout << "X..";
                    break;
                case 5:
                    cout << "XXX";
                    break;
                }
                break;
            case 3:
                switch (a[j][1]) {
                case 1:
                    cout << "XXX";
                    break;
                case 2:
                    cout << "..X";
                    break;
                case 3:
                    cout << "XXX";
                    break;
                case 4:
                    cout << "..X";
                    break;
                case 5:
                    cout << "XXX";
                    break;
                }
                break;
            case 4:
                switch (a[j][1]) {
                case 1:
                    cout << "X.X";
                    break;
                case 2:
                    cout << "X.X";
                    break;
                case 3:
                    cout << "XXX"; 
                    break;
                case 4:
                    cout << "..X"; 
                    break;
                case 5:
                    cout << "..X"; 
                    break;
                }
                break;
            case 5:
                switch (a[j][1]) {
                case 1:
                    cout << "XXX"; 
                    break;
                case 2:
                    cout << "X.."; 
                    break;
                case 3:
                    cout << "XXX"; 
                    break;
                case 4:
                    cout << "..X"; 
                    break;
                case 5:
                    cout << "XXX"; 
                    break;
                }
                break;
            case 6:
                switch (a[j][1]) {
                case 1:
                    cout << "XXX"; 
                    break;
                case 2:
                    cout << "X.."; 
                    break;
                case 3:
                    cout << "XXX"; 
                    break;
                case 4:
                    cout << "X.X"; 
                    break;
                case 5:
                    cout << "XXX"; 
                    break;
                }
                break;
            case 7:
                switch (a[j][1]) {
                case 1:
                    cout << "XXX";
                    break;
                case 2:
                    cout << "..X";
                    break;
                case 3:
                    cout << "..X";
                    break;
                case 4:
                    cout << "..X";
                    break;
                case 5:
                    cout << "..X";
                    break;
                }
                break;
            case 8:
                switch (a[j][1]) {
                case 1:
                    cout << "XXX";
                    break;
                case 2:
                    cout << "X.X";
                    break;
                case 3:
                    cout << "XXX";
                    break;
                case 4:
                    cout << "X.X";
                    break;
                case 5:
                    cout << "XXX";
                    break;
                }
                break;
            case 9:
                switch (a[j][1]) {
                case 1:
                    cout << "XXX";
                    break;
                case 2:
                    cout << "X.X";
                    break;
                case 3:
                    cout << "XXX";
                    break;
                case 4:
                    cout << "..X";
                    break;
                case 5:
                    cout << "XXX";
                    break;
                }
                break;
            }
            a[j][1]++;
            if (j!=N)cout << ".";
        }
        cout << "\n";
    }
    return 0;
}