问题RT，下面给出自己编写的程序（一部分）作为错误的例子，希望大神帮忙修改，最好能有解释，谢谢啦~~~~！！！！

#include <iostream>
#include <string>
class Equation
{
private:
    int answer,m;
    void (*mode[3])();                                  //定义了一个指向函数的指针数组
public:
    Equation();
    void setmode();
    void addition();
    void subtraction();
    void multiplication();
    int getanswer () const {return answer;}
    void *run () const {return mode[m];}                 //定义了一个指针类的函数，我希望通过这个指针函数来调用那个指针，从而调用所指向的函数
};
#endif
#include "Random.h"
#include "Equation.h"
#include <string>
#include <iostream>
using namespace std;
namespace
{    const string CORRECT_INFO[]={"Good job!","Correct,again!","You are so clever!","Wow,a talent!","You did it, Congratulations!"};
    const string WRONG_INFO[]={"Just carelessness,cheer up!","What a pity!","Sorry, you are fail."};
};
int main()
{    int score,ans,i,j;
    char whethergo;
    Equation equ;
    cout<<"Welcome to Guess!"<<endl;
    for (i=1;i<=10;i++)
    {    cout<<"Question "<<i<<endl;
        *equ.run();                                    //调用了那个指针类的函数，编译后报错
        for (j=0;j<3;j++)
        {    cin>>ans;
            if (ans==equ.getanswer())
            {    Random r(4);
                score+=10;
                cout<<"Right!"<<endl<<CORRECT_INFO[r.getr()]<<endl;
                break;
            }
            else
            {    Random r(2);
                cout<<"Wrong"<<endl<<WRONG_INFO[r.getr()]<<endl;
            }
        }
        if (j==3)
            cout<<"Sorry, you have no chances."<<endl;
        cout<<"Go ahead?(Y/N)";
        cin>>whethergo;
        if (whethergo=='N')
        {    cout<<"Your score is "<<score<<endl;
            break;
        }
    }
    if (i==11)
        cout<<"You have complete the game!"<<endl<<"Your score is "<<score<<endl;
    cout<<"Thank you for your support! Press any key to quit.";
    cin>>i;
    return 0;
}

--------------------Configuration: main - Win32 Debug--------------------
Compiling...
main.cpp
F:\study\VC++\guess\main.cpp(17) : error C2100: illegal indirection
执行 cl.exe 时出错.

main.obj - 1 error(s), 0 warning(s)

我的最终目的是在主程序中设法调用指向函数的指针*mode[i]，通过它运行所指向的程序。至于那个指针类的函数（外部接口）*run（）是我自己理解的，不知道这样的做法对不对。我是初学者，真心求教~！！谢谢~~~~~~！！

感谢版主大人~~~~~写的太详细了好感动~~~~

编译通过了，连接又有问题了T T继续求教啊。。。。谢谢谢谢谢谢
直接把程序代码传上来了。。。这个程序用来生成一个50以内的加减或9以内的乘法算式题，并让用户输入结果，有三次常识机会，一共10题每答对一道题10分。
新手写代码习惯可能不好。。。总之谢谢谢谢谢谢。。。

连接后错误：
--------------------Configuration: main - Win32 Debug--------------------
Linking...
main.obj : error LNK2001: unresolved external symbol "public: __thiscall Random::Random(int)" (??0Random@@QAE@H@Z)
main.obj : error LNK2001: unresolved external symbol "public: __thiscall Equation::Equation(void)" (??0Equation@@QAE@XZ)
Debug/main.exe : fatal error LNK1120: 2 unresolved externals
执行 link.exe 时出错.

可是书上还说最好把类的定义写到头文件里呢，现在又运行不成功。。这是为什么呢？？