钱能C++教材习题答案九



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更新时间 2005-5-8 10:47:25 
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第10章

//*****************
//*     10.1      *
//*****************
# include <iostream.h>

struct student{
        char name[8];
        float midd;
        float over;
};//注意此处必须输入分号

student& input(student& a);

float aver(student& b);

void main()
{
        student s;
        s=input(s);
        float m=aver(s);
        cout<<s.name<<" : "<<m<<endl;
}

student& input(student& a)
{
        cout<<"please input name:";
        cin>>a.name;
        cout<<"please input midd:";
        cin>>a.midd;
        cout<<"please input over:";
        cin>>a.over;
        return a;
}

float aver(student& b)
{
        return (b.midd+b.over)/2;
}

//*****************
//*     10.2      *
//*****************

void insert(unit& head,char * b)
{
        unit * i=head;

        while((i->name !="jone"&&(i->next != NULL))
        {
                i=i->next;
        }
        if(i->name =="jone"
        {
                unit * p=new unit;
                p->name="marit";
                p->next=i->next;
                i=p;
        }
        if(i->next == NULL)
        {
                unit * p=new unit;
                p->name="marit";
                p->next=NULL;
                i->next=p;
        }
}


//*****************
//*     10.3      *
//*****************
struct unit
{
        long data;
        unit * next;
};

unit * change(unit * head)
{
        unit* i=head;
        unit* j=NUL;
        while(i != NULL)
        {
                unit * p=new unit;
                p->data=i->data;
                p->next=j;
                j=p;
                unit * q=i;
                i=i->next;
                delete q;
        }
        return j;
}


//*****************
//*     10.4      *
//*****************
//(1):
void ShowList(Lnode * List)
{
        while(List != NULL)
        {
                cout<<List->data;
                List=List->next;
        }
}

void AddToEnd(Lnode* new1,Lnode * head)
{
        while (head != NULL)
        {
                head=head->next;
        }
        head=new1;
        new1->next=NULL;
}

//(2):
3
5
7
6
4
8

//(3):
void Delete(Lnode * head)
{
        while(head != NULL)
        {
                Lnode * p;
                p=head;
                head=head->next;
                delete p;
        }
}


//*****************
//*     10.5      *
//*****************
unit * hbing(unit * la,unit * lb)
{
        unit * p=la;
        if((la!=NULL)&&(lb!=NULL))
        {
                if(la->data<=lb->data)
                {
                        p=la;
                        la=la->next;
                }
                else
                {
                        p->next=lb;
                        p=lb;
                        lb=lb->next;
                }
        }
        if(la!=NULL)
        {
                p->next=la;
        }
        if(lb!=NULL)
        {
                p->next=lb;
        }
        return la;
}

//*****************
//*     10.6      *
//*****************

struct unit
{
long data;
char name[];
char sex;
int ages;
};
unit * index(unit * la)
{
        unit * p=la->next;
        unit * m=la;//作为新排好序的首指针
        while(p!=NULL)
        {
                unit * q=la;//新表中第一个大于或等于p的元素位置
                unit * k=q;//新表中最后一个小于p的元素位置
                while(q!=NULL)&&(q->data<p->data)//查找插入位置,位于K和Q之间
                {
                        k=q;q=q->next;
                }
                if(q==NULL)//到新链表尾
                {
                        k->next=p;p=p->next;k->next->next=NULL;//新元素是表尾
                }
                else//在新表中间插入
                {
                        k->next=p;p=p->next;k->next->next=q;//p插入k和q之间
                }
                       
        }
        return m;
}

第11章

//*****************
//*     11.1      *
//*****************

p.x+=5;
p.y+=6;
违反了类的保护机制,在类作用域外,无法访问类的被保护成员


//****************
//*11.2-Cat.h    *
//****************
class Cat
{
public:
        int GetAge();
        void SetAge(int age);
        void Meow();
protected:
        int itsAge;
};

//****************
//*11.2-Cat.cpp  *
//****************

# include <iostream.h>
# include "Cat.h"

int Cat::GetAge()
{
        return itsAge;
}

void Cat::SetAge(int age)
{
        itsAge=age;
}

void Cat::Meow()
{
        cout<<"Meow.\n";
}

//****************
//* 11.2-main.cpp*
//****************
# include <iostream.h>
# include "Cat.h"

void main()
{
        Cat frisky;
        frisky.SetAge(5);
        frisky.Meow();
        cout<<"frisky is a cat who is"
                <<frisky.GetAge()
                <<"years old.\n";
        frisky.Meow();
}

//******
//*11.3*
//******
# include <iostream.h>

class Date
{
public:
        void list();
        void set(int day,int month,int year);
        void adda();
private:
        int d;
        int m;
        int y;
};//注意此处的分号

void Date::list()
{
        cout<<d<<"/"<<m<<"/"<<y;
}
void Date::set(int day,int month,int year)
{
        d=day;
        m=month;
        y=year;
}
void Date::adda()
{
        d=d+1;//继续修改,进行日期、月份的判断
}

void main()
{
        Date d;
        d.set(23,11,2004);
        d.list();
        cout<<endl;
        d.adda();
        d.list();
        cout<<endl;
}


//******
//*11.4*
//******
# include <iostream.h>

class Time
{
public:
        void list();
        void set(int hour,int minith,int second);

private:
        int h;
        int m;
        int s;
};//注意此处的分号

void Time::list()
{
        cout<<h<<":"<<m<<":"<<s;
}
void Time::set(int hour,int minith,int second)
{
        h=hour;
        m=minith;
        s=second;
}

void main()
{
        Time t;
        t.set(9,11,56);
        t.list();
        cout<<endl;
}


//*************
//*11.4-Time.h*
//*************
class Time
{
public:
        void list();
        void set(int hour,int minith,int second);

private:
        int h;
        int m;
        int s;
};//注意此处的分号
//***************
//*11.4-Time.cpp*
//***************
# include <iostream.h>
# include "Time.h"


void Time::list()
{
        cout<<h<<":"<<m<<":"<<s;
}
void Time::set(int hour,int minith,int second)
{
        h=hour;
        m=minith;
        s=second;
}
//***************
//*11.4-main.cpp*
//***************
# include <iostream.h>
# include "Time.h"
void main()
{
        Time t;
        t.set(9,11,5);
        t.list();
        cout<<endl;
}


//******
//*11.5*
//******
# include <iostream.h>

struct Node
{
        int a;
        Node * next;
};

class stack
{
public:
        void put(int item);
        int get();
private:
        Node * head;
};

void stack::put(int item)
{
        Node * p=new Node;
        p->a=item;
        p->next=head;
        head=p;
}


int stack::get()
{
        Node * q=head;
        head=head->next;
        return q->a;
}

void main()
{
        stack st;
        st.put(10);
        st.put(12);
        st.put(14);
        cout<<st.get()<<endl;
        cout<<st.get()<<endl;
}



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