LeetCode

C++中this->的作用？

class MyQueue {
public:
    stack stIn;
    stack stOut;
    MyQueue() {

    }
    
    void push(int x) {
        stIn.push(x);
    }
    
    int pop() {
        if (stOut.empty()) {
            while (!stIn.empty()) {
                stOut.push(stIn.top());
                stIn.pop();
            }            
        }
        int result = stOut.top();
        stOut.pop();
        return result;
    }
    
    int peek() {
        int res = this->pop();
        stOut.push(res);
        return stOut.top();
    }
    
    bool empty() {
        if (stIn.empty() && stOut.empty()) return true;
        return false;
    }
};