virtual

问题 If I have a simple 2 level class hierarchy as, for instance, this one: // level 1 class Spare_Part{ private: string name; double price; public: Spare_Part(); string getName() { return name; } double getPrice() { return price; } virtual int getQuantity() { return -1; }; // may also define it as pure virtual }; //level 2 class On_hand : public Spare_Part{ private: int quantity; string location; public: On_hand(); int getQuantity(){ return quantity; } }; I want to have access to the member

问题 If I have a simple 2 level class hierarchy as, for instance, this one: // level 1 class Spare_Part{ private: string name; double price; public: Spare_Part(); string getName() { return name; } double getPrice() { return price; } virtual int getQuantity() { return -1; }; // may also define it as pure virtual }; //level 2 class On_hand : public Spare_Part{ private: int quantity; string location; public: On_hand(); int getQuantity(){ return quantity; } }; I want to have access to the member

问题 I have 3 different Windows 10 virtual desktops. When the computer starts up, I want python to load all of my applications in the different virtual desktops. Right now I can only start things in Desktop 1. How do I tell python to launch an app but in Desktop 2 and 3? I'm using python 3.6. 回答1: How do I tell python to launch an app but in Desktop 2 and 3? This can be achieved by launching your applications with subprocess.Popen() , then changing virtual desktop by calling GoToDesktopNumber()

问题 I have 3 different Windows 10 virtual desktops. When the computer starts up, I want python to load all of my applications in the different virtual desktops. Right now I can only start things in Desktop 1. How do I tell python to launch an app but in Desktop 2 and 3? I'm using python 3.6. 回答1: How do I tell python to launch an app but in Desktop 2 and 3? This can be achieved by launching your applications with subprocess.Popen() , then changing virtual desktop by calling GoToDesktopNumber()

问题 So I have a very unique situation. Problem Virtual services route rules are not applied. We have a buzzfeed sso setup in our cluster. We wand to modify response headers to i.e Add header. to each request that matches the uri sign_in. Buzzfeed sso has its own namespace. Now To accomplish this I have created a virtual service. Steps to Reproduce : We used this virtual service spec to create the route rules. apiVersion: networking.istio.io/v1alpha3 kind: VirtualService metadata: name: sso-auth

问题 So I have a very unique situation. Problem Virtual services route rules are not applied. We have a buzzfeed sso setup in our cluster. We wand to modify response headers to i.e Add header. to each request that matches the uri sign_in. Buzzfeed sso has its own namespace. Now To accomplish this I have created a virtual service. Steps to Reproduce : We used this virtual service spec to create the route rules. apiVersion: networking.istio.io/v1alpha3 kind: VirtualService metadata: name: sso-auth

问题 I got this error while using windows command prompt to connect a android virtual device to visual studio code. However opens the android virtual device but still says no connected devices when run the flutter doctor command. please help to use a android virtual device for visual studio code. 回答1: This error occur because there is a query for file in C:\qemu.conf path. If you create a blank file the warning Failed to open /qemu.conf, err: 2 will desapear. But in my tests, I needed to run as an

问题 I know this question was asked several time, but i don't find how to resolve it. I get this error when i'm trying to build my project: error LNK2019: unresolved external symbol "public: virtual __thiscall IGameState::~IGameState(void)" (??1IGameState@@UAE@XZ) in function "public: virtual __thiscall MenuState::~MenuState(void)" (??1MenuState@@UAE@XZ) Here is my code: IGameState.h class IGameState { public: virtual ~IGameState(); virtual void update() = 0; virtual void render() = 0; };

问题 I know this question was asked several time, but i don't find how to resolve it. I get this error when i'm trying to build my project: error LNK2019: unresolved external symbol "public: virtual __thiscall IGameState::~IGameState(void)" (??1IGameState@@UAE@XZ) in function "public: virtual __thiscall MenuState::~MenuState(void)" (??1MenuState@@UAE@XZ) Here is my code: IGameState.h class IGameState { public: virtual ~IGameState(); virtual void update() = 0; virtual void render() = 0; };

问题 I have a base class with two overloaded functions f(void) and f(int) . The class Derived implements f(int) by calling f(void) . Derived2 implements f(void) only. The compiler rejects the implementation Derived::f(int) because it wants to call f(int) but I provided no arguments because I want to call f(void) . Why does the compiler reject it? Why does adding the line virtual int f(void) = 0; fix my problem? class Base { public: explicit Base(void) {} virtual ~Base(void) {} virtual int f(void)