题解 | #密码验证合格程序#

#include <iostream>
#include <string>
#include<cstring>
using namespace std;

int fun(string str);
int main()
{
    string str;

    int a = 0;

    while (getline(cin,str))
    {
        if (str.size() <= 8)
            //cout<<"重新输入"<<endl;
        {
            cout << "NG" << endl;
            goto here;
        }

        for (int i = 0; i < str.size(); i++)
        {
            if (str[i] == '\0' || str[i] == '\n')
            {
                cout << "NG" << endl;
                goto here;
            }
        }
        
        //出现两次
        for (int i = 0; i < str.size()-2; ++i)
        {
            string str1 = str.substr(i, 3);
            int cc = 0;
            for (int j = 0; j < str.size()-2; ++j)
            {
                string str2 = str.substr(j, 3);
                if (str1 == str2)
                {
                    cc++;
                    if (cc >= 2)
                    {
                        cout << "NG" << endl;
                        goto here; //可以加goto，，，也可以在循环加多个break，比如if（）break;
                    }
                }
            }
        }


        a = fun(str);
        if (a >= 3)
            cout << "OK" << endl;
        else
            cout << "NG" << endl;
    here:
        cin.get();
    }
    //here:
    return 0;
}
int fun(string str)
{
    int num = 0, low_word = 0, up_word = 0, other = 0;
    int flag = 0;
    for (int i = 0; i < int(str.size()); i++)
    {
        if (str[i] >= '0' && str[i] <= '9')
            num++;
        else if (str[i] >= 'a' && str[i] <= 'z')
            low_word++;
        else if (str[i] >= 'A' && str[i] <= 'Z')
            up_word++;
        else
            other++;
    }
    if (num > 0)
        flag++;
    if (low_word > 0)
        flag++;
    if (up_word > 0)
        flag++;
    if (other > 0)
        flag++;
    return flag;
}