大连海事大学C语言与Windows程序设计6道课后题答案1.（1）设计具有以下功能的程序：从键盘上输入10个非负整数，统计并输出最大数和最小数，当输入负数时结束输入。

#include <iostream.h>void main(){int a, max=-1, min=32767,num=1;cout<<"Please input a number:"<<endl;do{cin>>a;if(a<0) break; //输入负数结束输入if(a>max) max =a;if(a<min) min =a;num++;}while (a>=0&&num<=10);if(max>=0)cout<<"Max="<<max<<endl<<"Min="<<min<<endl;elsecout<<"No data!";}1.（2）编程序实现求和：S=1-1/3+1/5-1/7+……+1/n。

要求：n值在程序运行时从键盘输入。

#include<stdio.h>void main(){inti,n,sign=1;float sum=0.0;printf("请输入n：");scanf("%d",&n);for(i=1;i<=n;i+=2){sum+=sign*(1.0/i);sign=-sign;}printf("\nsum=%f\n",sum);}2.设计具有以下功能的程序：从键盘输入10个整数，然后排序。

（要求：利用函数调用实现并以数组作为函数的参数）3.编写几何点（二维平面上）的类Point，包括位置属性（二维坐标x，y），成员函数包括：点的位置获取函数GetX（）和GetY（），点的位置设置函数SetX（）和SetY（），点的位置移动函数MoveTo（）点的信息打印函数Display（）。

void main(){Point p(100,100);p.Display();p.MoveTo(200,200);cout<<"after moving…"<<endl;p.Display();}程序输出结果如下：X: 100Y: 100after moving…X: 200Y: 200#include <iostream.h>class Point{private:int X;int Y;public:Point(int X, int Y){this->X = X;this->Y = Y;}Point(){this->X = 0;this->Y = 0;}~Point(){}intGetX(){return this->X;}intGetY(){return this->Y;}voidSetX(int X){this->X = X;}voidSetY(int Y){this->Y = Y;}voidMoveTo(int X, int Y){SetX(X);SetY(Y);}void Display(){cout<<"X: "<<GetX()<<endl;cout<<"Y: "<<GetY()<<endl;}};4.编写几何图形圆的类Circle，包括两个属性：圆心O（用上题中的Point类实现）和半径R。

成员函数包括：圆心位置获取函数GetO（）半径获取函数GetR（）半径位置设置函数SetR（）圆的位置移动函数MoveTo（）圆的半径设置函数SetR（）圆的信息打印函数Display（）void main(){Point p(100,100);Point p2(200,200);Circle c(p, 100);c.Display();c.MoveTo(p2);cout<<"after moving"<<endl;c.Display();c.SetR(200);cout<<"after altering r"<<endl;c.Display();}程序输出结果如下：Circle: (100,100),100after movingCircle: (200,200),100after altering rCircle: (200,200),200#include <iostream.h>class Point{private:int X;int Y;public:Point(int X, int Y){this->X = X;this->Y = Y;}Point(){this->X = 0;this->Y = 0;}~Point(){}intGetX(){return this->X;}intGetY(){return this->Y;}voidSetX(int X){this->X = X;}voidSetY(int Y){this->Y = Y;}voidMoveTo(int X, int Y){SetX(X);SetY(Y);}/* void Display(){cout<<"X: "<<GetX()<<endl;cout<<"Y: "<<GetY()<<endl;}*/};/////////////////////////class Circle{private:Point O;int R;public:Circle(Point& p, int R){O.MoveTo(p.GetX(),p.GetY());this->R = R;}~Circle(){}Point GetO(){return this->O;}intGetR(){return this->R;}voidMoveTo(Point& p){O.MoveTo(p.GetX(), p.GetY());}voidSetR(int R){this->R = R;}void Display(){cout<<"Circle: ("<<O.GetX()<<","<<O.GetY()<<"),"<<R<<endl;}};void main(){Point p(100,100);Point p2(200,200);Circle c(p, 100);c.Display();c.MoveTo(p2);cout<<"after moving"<<endl;c.Display();c.SetR(200);cout<<"after altering r"<<endl;c.Display();}5.编写一个有关日期(年、月、日)和时间(时、分、秒)的程序。

该程序建立三个类，其中一个是日期的类Date，一个是时间的类Time，另一个是日期和时间类TimeDate，它是前面两个类为基类的派生类。

void main(){TimeDate date1, date2(1998, 8, 12, 12, 45, 10);date1.SetDate(1998, 8, 7);date1.SetTime(10, 30, 45);cout<<"The date1 date and time is:";date1.GetDT();cout<<"The date1 date is:";date1.GetDate();cout<<"The date1 time is:";date1.GetTime();cout<<"The date2 date and time is:";date2.GetDT();}#include<iostream.h>class Date{public:Date() {}Date(int y, int m, int d) { SetDate(y, m, d); }voidSetDate(int y, int m, int d){Year = y;Month = m;Day = d;}voidGetDate(){cout<<Year<<"/"<<Month<<"/"<<Day<<endl;}protected:int Year, Month, Day;};class Time{public:Time() {}Time(int h, int m, int s) { SetTime(h, m, s); }voidSetTime(int h, int m, int s){Hours = h;Minutes = m;Seconds = s;}voidGetTime(){cout<<Hours<<":"<<Minutes<<":"<<Seconds<<endl;}protected:int Hours, Minutes, Seconds;};classTimeDate:public Date, public Time{public:TimeDate(){}TimeDate(int y, intmo, int d, int h, int mi, int s):Date(y, mo, d), Time(h, mi, s) {}voidGetDT(){cout<<Year<<"/"<<Month<<"/"<<Day<<"_"<<Hours<<":"<<Minutes<<":"<< Seconds<<endl;}};void main(){TimeDate date1, date2(1998, 8, 12, 12, 45, 10);date1.SetDate(1998, 8, 7);date1.SetTime(10, 30, 45);cout<<"The date1 date and time is:";date1.GetDT();cout<<"The date1 date is:";date1.GetDate();cout<<"The date1 time is:";date1.GetTime();cout<<"The date2 date and time is:";date2.GetDT();}6.生成一个Object抽象类，在其中声明double CalArea（）为纯虚函数，从Object派生出：Rect类（其中包含成员变量Point topleft，Point bottomright。