PAT B1081

1081 Check the password (15 branch )

This topic requires you to help the user registration module of a website write a small function of password legitimacy check . The website requires that the password set by users must be no less than 6 Characters make up , And can only have English letters 、 Numbers and decimal points ., There must also be both letters and numbers .

Input format ：

The first line of input gives a positive integer N（≤ 100）, And then N That's ok , Each line gives a password set by the user , For no more than 80 A non empty string of characters , End with a carriage return .

Be careful ： The title guarantees that there is no input with only decimal point .

Output format ：

Password for each user , Output system feedback information in one line , Below 5 Kind of ：

• If the password is legal , Output Your password is wan mei.;
• If the password is too short , Whether legal or not , All output Your password is tai duan le.;
• If the password length is legal , But there are illegal characters , The output Your password is tai luan le.;
• If the password length is legal , But only letters, no numbers , The output Your password needs shu zi.;
• If the password length is legal , But only numbers, no letters , The output Your password needs zi mu..

sample input ：

5
123s
zheshi.wodepw
1234.5678
WanMei23333
pass*word.6

sample output ：

Your password is tai duan le.
Your password needs shu zi.
Your password needs zi mu.
Your password is wan mei.
Your password is tai luan le.

It is worth noting that , If you use cin Function input , You should use getline Function input , Otherwise, a set of data cannot pass completely , Even if it's scanf Function cannot adopt , Use fgets() function , You can't use gets() function , as a result of gets Function in PAT Can't go through , also gets Functions also have drawbacks , When the input data is greater than gets Function's cache memory , It will overflow , Overwrite the contents of the cache . If use fgets function , If I make no mistakes , I think so ：

char str[90];

fgets(stdin,90,str);

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

int main()
{
    int n;
    cin >> n;
    getchar();
    while(n--)
    {
        string str;
       // cin >> str;     // You can't use cin Input , Otherwise, a set of data will not pass , Because one line may have blank space input 
        getline(cin,str);
        int len=str.size();
        if(len<6)
        {
            cout << "Your password is tai duan le.\n";
            continue;
        }
        int num=0,alpha=0;
        for(int i=0;i<len;++i)
        {
            if(!isalnum(str[i])&&str[i]!='.')
            {
                cout << "Your password is tai luan le.\n";
                break;
            }
            if(isdigit(str[i]))
                num=1;
            if(isalpha(str[i]))
                alpha=1;
            if(i==len-1&&num==0)
                cout << "Your password needs shu zi.\n";
            if(i==len-1&&alpha==0)
                cout << "Your password needs zi mu.\n";
            if(i==len-1&&num==1&&alpha==1)
                cout << "Your password is wan mei.\n";
        }
    }
    return 0;
}