c++ - 创建一组不起作用的类

Question

我正在尝试使用 vector 创建类数组，但我认为实例化数组时语法错误。我得到的错误是:

错误:请求对象[0]中的成员“setX”，它是非类类型“std::vector”

#include <iostream>
#include <vector>

using std::cout;

class A {
    public:
        void setX(int a) { x = a; }
        int getX() { return x; }
    private:
        int x;
};

int main() {

    std::vector<A> *objects[1];

    objects[0].setX(5);
    objects[1].setX(6);

    cout << "object[0].getX() = " << objects[0].getX() << "\nobject[1].getX() = " << objects[1].getX() << std::endl;
}

Answer 1

std::vector<A> objects; // declare a vector of objects of type A
objects.push_back(A()); // add one object of type A to that vector
objects[0].setX(5); // call method on the first element of the vector