題目鏈接

http://codeforces.com/problemset/problem/118/A

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

int main()
{
    string str;
    cin>>str;

    int i;
    //將代碼變成小寫
    transform(str.begin(), str.end(), str.begin(), ::tolower);
    
 
//移除特定的字符串
    str.erase(std::remove(str.begin(), str.end(), ‘a‘), str.end());
    str.erase(std::remove(str.begin(), str.end(), ‘e‘), str.end());
    str.erase(std::remove(str.begin(), str.end(), ‘i‘), str.end());
    str.erase(std::remove(str.begin(), str.end(), ‘o‘), str.end());
    str.erase(std::remove(str.begin(), str.end(), 
 
‘u‘), str.end());
    str.erase(std::remove(str.begin(), str.end(), ‘y‘), str.end());
    int len=str.length();
    for(i=0;i<len;i++)
    {

            cout<<"."<<str[i];
    }

    return 0;
}

Codeforces 118A String Task