C++---练习_void showshape

第一篇：

代码：

#include<iostream>
using namespace std;
class DataList
{
    int len;
    double *d;
public:
    DataList (int len,double data[]=NULL);
    DataList(){delete[]d;}
    int length()const{return len;}
    double getElement (int i)const{return d[i];}
    void sort()const;
};
void writeToFile(char*,const DataList&);
//main.cpp
#include"DataList.h"
 
DataList::DataList(int len,double data[]):len(len)
{
    d = new double[len];
    for(int i = 0;i<len;i++)
    d[i]=(data==NULL?0.0:data[i]);
}
void DataList::sort()
{
    for(int i=0;i < len;++i)
    for(int j =i;j< len; ++j)
    if(d[i]>d[j])
    {
        int temp =d[i];
        d[i] =d[j];
        d[j] = temp;
    }
}
void DataList::sort()const
{
    for(int i =0;i<len -1;i++)cout<<d[i]<<",";
    cout<<d[len-1]<<endl;
}
int main()
{
    double s[] = {7,1,3,11,6,9,12,10,8,4,5,2};
    DataList list (12,s);
    cout<<"排序前：";
    list.show();
    list.sort();
    cout<<endl<<"排序后：";
    list.show();
    writeToFile("",list);
    return 0;
}

命令：

第二篇：

代码： 

#include<iostream>
using namespace std;
class Door
{
    int num;
    bool closed;
    bool locked;
public:
    Door(int num)
    {
        this->num=num;
        closed = locked=true;
    }
    bool isClosed()const{return closed;}
    bool isOpened()const{return! closed;}
    bool isLocked()const{return locked;}
    bool isUnlocked()const{retuen !locked;}
    void open()
    {
        cout<<endl<<"打开"<<num<<"号门...";
        if(!=closed)
        cout<<"门是开着的，无须在开门。";
        else if(locked)
        count<<"门是锁着的，打不开。";
        else
        {
            closed = false;
            cout << "门打开了。";
        }
    }
    void close()
    {
        cout<< endl<<"关上"<<num<<"号门...";
        if(closed)
        cout<<"门是关着的，无须在关门。"；
        else
        {
            closed = true;
            cout <<"门关上了。";
        }
    }
    void lock()
    cout<<endl<<"锁上"<<num<<"号门...";
    if(locked)
{
    cout<<"门是锁着的，无须再锁门。"；
    else
    {
        if(!closed)
        {
            cout<<"先关门...";
            closed=true;
        }
        locked = true;
        cout<<"门锁上了。";
    }
}
void unlock()
{
    cout<<endl<<"开"<<num<<"号门的锁...";
    if(!locked)
    cout << "门没有上锁，无须再开锁。";
    else
    {
        locked = false;
        cout<<"锁开了。";
    }
}
};
int main()
{
    Door door(503);
    door.open();
    door.unlock();
    door.open();
    door.open();
    door.lock();
    return 0;
}

命令：

第三篇：

代码：

#include<iostream>
using namespace std;
class CharShape
{
public:
    CharShape(char ch):_ch(ch){};
    virtual void Show() = 0;
protected:
    char _ch;
};
class Triangle:public CharShape
{
public:
    Thiangle(char ch,int r):CharShape(ch),_rows(r){}
    void Show();
private:
    int_rows;
};
class Rectangle: public CharShape
{
public:
    Rectangle(char ch, int r,int c):CharShape(ch),_rows(r),_cols(c){}
    void Show();
private:
    int_rows,_cols;
void Triangle::Show()
    {
    for(int i = 1;j<=i*2-1;i++)
        count << _ch;
        cout << endl;
    }
}
void Rectangle::Show()
{
    for(int i &