Please help me with this doubt

#1

Please help me with this doubt.

#2

@cbcao263 hey you can simply take the difference between characters and print them, start from 1 and go till length of string.

#3

@cbcao263 here is how you can do all things, this will be done in O(n)

#include<bits/stdc++.h>
using namespace std;
int main()
{
	string s;
	cin>>s;
    transform(s.begin(), s.end(), s.begin(), ::tolower);            //convert string to lower case.
    set<char> vowel={'a','e','i','o','u'};
    string ans="";
	//Vowels are a,e,i,o,u
	for(int i = 0;i<s.size();i++)
    {
        if(vowel.find(s[i])==vowel.end())
        {
            if(s[i]>'a' && s[i]<='z')                            //checking if alphabet
            ans.push_back('.');
            ans.push_back(s[i]);
        }
    }
    cout<<ans;   //desired string
}
//Delete all Vowels, How can I delete it
//Inserts a character "." before each constraint
//Replaces alll uppercase with lowercase ones.

If this resolves your doubt mark it as resolved.

#4

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