错误：'移动'之前的预期类型说明符

Question

我做了一项研究，但解决方案与我的程序不匹配。从大代码我只采取了错误的部分。请建议。

#include <iostream>
using namespace std;

class Products {

    static Products* prod;

public:
    //Creat a static funtion which does the task what client was doing
    static void checkStockStatus(int choice)
    {
        switch (choice) {
        case 1:
            prod = new Mobile();
            break;
        }
        prod->inStockStatus();
    }

    virtual void inStockStatus() = 0;
};

class Mobile : public Products {
public:
    void inStockStatus()
    {
        cout << "Mobiles are instock" << endl;
    }
};

int main()
{
    int choice = 1;
    Products::checkStockStatus(choice);
    return 0;
}

输出：  在静态成员函数'static void Products :: checkStockStatus（int）'中：  14：29：错误：'Mobile'之前的预期类型说明符