1)、构造一个类CalculateFun，公有部分包含构造、析构函数、外部接口函数void AllByOne()、和静态成员函数static void ShowSequence()。私有部分包含：void InsideCalculation()、void SetData()、int x、int y和静态成员变量static int snCount。 2)、构造函数CalculateFun()初始化x和y的值，私有成员函数InsideCalculation和SetData函数供AllByOne函数调用，而外部main函数中对于Calculation的任意对象仅仅调用AllByOne就可以实现从键盘上输入x、y的值，求出x和y的两数平方和结果并显示出来。其中SetData用于键盘输入x和y的值，InsideCalculation用于计算两数平方和并显示结果。 3)、建立void ObjectOperating(CalculateFun *pObject)普通函数，功能是对形参中的对象指针调用其接口函数AllByOne()，并且调用静态成员函数ShowSequence来显示是第几次调用对象。 4)、main函数中建立一个含三个元素的对象指针数组pArr，分别对其三个元素new出三个对象，并调用ObjectOperating函数。完了后用delete释放new出的内存。

好的，我明白了您的问题。以下是代码实现：

#include <iostream>
using namespace std;

class CalculateFun {
public:
    CalculateFun();
    ~CalculateFun();
    void AllByOne();
    static void ShowSequence();
private:
    void InsideCalculation();
    void SetData();
    int x, y;
    static int snCount;
};

int CalculateFun::snCount = 0;

CalculateFun::CalculateFun() {
    x = y = 0;
}

CalculateFun::~CalculateFun() {

}

void CalculateFun::AllByOne() {
    SetData();
    InsideCalculation();
}

void CalculateFun::ShowSequence() {
    cout << "This is the " << snCount << "th object operated." << endl;
}

void CalculateFun::InsideCalculation() {
    int result = x * x + y * y;
    cout << "The result is " << result << endl;
}

void CalculateFun::SetData() {
    cout << "Please input x and y: " << endl;
    cin >> x >> y;
    snCount++;
}

void ObjectOperating(CalculateFun* pObject) {
    pObject->AllByOne();
    CalculateFun::ShowSequence();
}

int main() {
    CalculateFun* pArr[3];
    for (int i = 0; i < 3; i++) {
        pArr[i] = new CalculateFun();
        ObjectOperating(pArr[i]);
    }

    for (int i = 0; i < 3; i++) {
        delete pArr[i];
    }

    return 0;
}

输出结果：

Please input x and y:
1 2
The result is 5
This is the 1th object operated.
Please input x and y:
3 4
The result is 25
This is the 2th object operated.
Please input x and y:
5 6
The result is 61
This is the 3th object operated.