ForNewbies/ReverseWords.cpp at main · Malhotraankushgithub/ForNewbies · GitHub

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#include <bits/stdc++.h>
using namespace std;

string reverse_words(string &s)
{
    int left = 0, i = 0, n = s.size();
    while (s[i] == ' ')
        i++;
    left = i;
    while (i < n)
    {
        if (i + 1 == n || s[i] == ' ')
        {
            int j = i - 1;
            if (i + 1 == n)
                j++;

            while (left < j)
                swap(s[left++], s[j--]);

            left = i + 1;
        }
        if (i > left && s[left] == ' ')
            left = i;

        i++;
    }
    reverse(s.begin(), s.end());
    return s;
}

int main()
{

    string str;
    cout << "Enter the String to be reversed : " << endl;
    getline(cin, str);
    str = reverse_words(str);
    cout << str;
    return 0;
}