reverse_string_using_stack.cpp

//https://practice.geeksforgeeks.org/problems/reverse-a-string-using-stack/1/?track=dsa-workshop-1-stack&batchId=308
char* reverse(char *S, int len)
{
    stack<char>st;
    for(int i =0; i < len; i++)
    {
        st.push(S[i]);
    }
    for(int i =0;  i< len; i++)
    {
        S[i] = st.top();
        st.pop();
    }
    return S;
}