C语言以下描述如何表示出来?

#include <iostream> //cin, cout, endl
#include <cassert>  //assert
using std::cin;     using std::cout;    using std::endl;
int square(int integer);        //平方
int cube(int integer);          //立方
int factorial(int integer);     //阶乘
int (*whichFunction(int integer, int result))(int); //哪一个函数指针
int main()
{
    int integer=0, result=0;    //整数，计算结果
    while(true)
    {
        cout<<"Enter two integers (e.g., 3  27): ";
        cin>>integer>>result;
        int (*(*ptrWhichFunction)(int, int))(int)=&whichFunction;
            //指向“哪一个函数指针”的指针
        int (*ptrFunction)(int)=(*ptrWhichFunction)(integer, result);
            //指向“哪一个函数”的指针
        if(ptrFunction!=0)
            assert(ptrFunction(integer)==result);
        else
            break;
    }
    return 0;
}
int square(int integer){ return integer*integer; }
int cube(int integer){ return integer*integer*integer; }
int factorial(int integer)
{
    int result=1;
    while(integer>1)
        result*=integer--;
    return result;
}
int (*whichFunction(int integer, int result))(int)
{
    int (*functions[])(int)={&square, &cube, &factorial};       //函数指针数组
    const size_t length=sizeof(functions)/sizeof(functions[0]); //数组长度
    const char* names[length]={"square", "cube", "factorial"};  //名称数组
    int results[length]={square(integer), cube(integer), factorial(integer)};   //结果数组
    for(size_t index=0; index<length; index++)
        if(result==results[index])
        {
            cout<<names[index]<<" of "<<integer<<" is "<<result<<endl;
            return functions[index];
        }
    return 0;
}