调调代码，我看没有啥问题

#include<iostream>
using namespace std;
string str, password[5000];
int cnt=0, index=0;

bool is_good(string s){
    //检验是否合规
    int number=0, big_letter=0, small_letter=0, special=0;
    if(s.size()<6) return false;
    if(s.size()>12) return false;

    for(int i=0; i<=s.size()-1; i++){
        if(s[i]>='0' && s[i]<='9') number++;
        else if(s[i]>='A' && s[i]<='Z') big_letter++;
        else if(s[i]>='a' && s[i]<='z') small_letter++;
        else if(s[i]=='!' || s[i]=='@' || s[i]=='#' || s[i]=='$') special++;
    } 

    if(number+big_letter+small_letter+special != s.size()) return false;

    if(special<1) return false;
    if(big_letter==0 ) return false;
    if(small_letter==0) return false;
    if(number==0) return false;

    return true;
}

int main(){
    cin>>str;
    string s = str + ",  ";
    for(int i=0; i<=s.size()-1; i++){
        if(s[i]==','){
            string pw = s.substr(index, s.find(',', index)-index);
            password[cnt] = pw;
            index = i+1;
            cnt++;
        }
    }
    for(int x=0; x<=cnt; x++){
        if( is_good(password[x]) ) cout<<password[x]<<endl;
    }
    return 0;
}