LeetCode - Reverse String

class Solution {
public:
    void reverseString(vector<char>& s) {
        if(!s.at(0)) return;
        
        int aPointer = 0;
        int bPointer = s.size()-1;
        
        while(aPointer <= bPointer)
        {   
            char temp = s.at(aPointer);
            s.at(aPointer) = s.at(bPointer);
            s.at(bPointer) = temp;
            
            ++aPointer;
            --bPointer;
        }
    }
};