c++ solution

[poojathakoor]

In place string reverse

class Solution {
public:
    string reverseString(string s) {
        for(int i=0,j=s.size()-1;i<j;i++,j--){
            char temp = s[i];
            s[i] = s[j];
            s[j] = temp;
        }
        return s;
    }
};