学步园

题意：输入一个长度不超过100的字符串，然后按三个规则处理：1、去掉"A", "O", "Y", "E", "U", "I"；2、剩余字母每个在前面加个“.”；3、大写变小写。

题目链接：http://codeforces.com/problemset/problem/118/A

——>>照着题目做就是了。

#include <iostream>
#include <cstring>

using namespace std;

int main()
{
    string s;
    while(cin>>s)
    {
        int len = s.length(), i;
        for(i = 0; i < len; i++)
        {
            if(s[i] == 'A' || s[i] == 'O' || s[i] == 'Y' || s[i] == 'E' || s[i] == 'U' || s[i] == 'I' ||
               s[i] == 'a' || s[i] == 'o' || s[i] == 'y' || s[i] == 'e' || s[i] == 'u' || s[i] == 'i')
                continue;
            if(isalpha(s[i]) == 1)
                cout<<"."<<(char)(s[i]+32);
            else
                cout<<"."<<s[i];
        }
        cout<<endl;
    }
    return 0;
}