求大佬帮看，谢谢！！

#include <iostream>
using namespace std;
char c;
int n;
string read(){
    string s = "", s1;
    while (cin >> c) {
        if (c == '[') {
            cin >> n;
            s1 = read();
            for (int i = 1; i <= n; i++) 
                s += s1;
        }
        else if (c == ']') {
            return s;
        }
        else {
            s += c;
        }
    }
}
int main () {
    cout << read();
    return 0;
}