Question

我尝试在std :: map容器中保存Actions类方法的指针。当我尝试这样做时，编译器显示C3867和C2440错误。 Here is the screenshot of the errors

#include <iostream>
#include <map>

using namespace std;

typedef void(*FunctionPointer)();

class Actions
{
public:
    Actions(){}
    ~Actions(){}

    void DoSomething() { cout << "Something" << endl; }
};

class Commands
{
public:
    Commands(){}
    ~Commands() {}

    // Initialize commands list
    void Init() { commandsList_["Something"] = actions_.DoSomething; }

    // Calls command using its name
    void CallCommand(std::string commandName) { commandsList_[commandName](); }
private:
    std::map <std::string, FunctionPointer> commandsList_;
    Actions actions_;
};


int main()
{
    Commands commands;
    commands.Init();

    commands.CallCommand("Something");

    return 0;
}

我尝试投了它：commandsList_["Something"] = (FunctionPointer)actions_.DoSomething;但它显示错误C2440 Screenshot

我有数百个命令，希望降低主控制台方法的复杂性，并且不希望逐个调用每个方法。我该怎么办？是否可以将函数保存为指针？

通过指针c ++调用函数

0 个答案: