C/C++ Basics--function pointer

1.basic concepts
    function pointer in C/C++ is just like delegate in C#. we can use function pointer to point to a specific function, and then use function pointer to invoke the specified function.
    eg.
    int max(int a,int b)
    {
    return a>b?a:b;
    }

    void main()
    {
    int (*p)(int,int); //declare a function pointer
    p=max;//the function point must has the same return type and parameter type with specified function.
    printf("max(2,3) is %d",p(2,3));
    }
    //the result is 3;

also , we can use typedef to define a function pointer type to simplify the programming.
eg.
    #typedef int (*MyFunPointer)(int a,int b);
    //we define a function pointer type which has int return type and has two int parameters.
    void main()
    {
    MyFunPointer p;
    p=max;
    printf("max(2,3) is %d",p(2,3));
    }