Code:
class c {
private:
    int i;
public:
    c() : i(5) {}

    void print() {
        int i = 3;
        cout << i << endl;
        cout << this->i << endl;
    }
};

int main() {
    c var;

    var.print();
    return 0;
}
That should print
Code:
5
3