118A A String Codeforces Solution in C++

a-string.cpp

#include<iostream>
#include<string>

using namespace std;

int main(){
    string s1, s2;
    cin>>s1;
    for(int i=0; i<s1.length(); i++){
        if(s1[i]=='a' || s1[i]=='e' || s1[i]=='i' || s1[i]=='o' || s1[i]=='u' || s1[i]=='A' || s1[i]=='E' || s1[i]=='I' || s1[i]=='O' || s1[i]=='U' || s1[i]=='Y' || s1[i]=='y'){
            continue;
        }else{
            s2+='.';
            s2+=tolower(s1[i]);
        }
        
    }
    cout<<s2;
    return 0;
}