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实验9 c++

problem :A 第一个类

 

#include <iostream>
#include <iomanip>
#include <cstring>
#include <cmath>
using namespace std;

class Thing
{
private:
    string name;
public:
    Thing(){}
    Thing(string n):name(n) {cout << "" << name << endl;}
    ~Thing(){ cout << "Destroy a thing" << " " << name << endl;}

};



int main()
{
    Thing A("Car");
    string str;
    cin>>str;
    Thing B(str);
    return 0;
}

 problem b:建造一间教室

description:

一间教室包括很多物品。这里只考虑灯(Light)和椅子(Chair)。定义Light类,只有一个int类型的参数,表示灯的瓦数;定义Chair类,只有一个字符串类型的参数,表示椅子的颜色。定义ClassRoom类,包括四个属性:两个int类型的属性,分别为灯的个数和椅子的个数。一个Light类的对象和一个Chair类的对象,分别为教室中灯的种类和椅子的种类。

input:

输入有6行,第1行是一个正整数,表示灯的瓦数。第2行是一个不含空白符的字符串,表示椅子的颜色。第3、4行表示教室中灯的个数和椅子的数量。第5行是一个正整数,表示教室中灯的瓦数,第6行是一个不含空白符的字符串,表示教室中椅子的颜色。

sample input:

20

blue

16

100

25

red

sample output:

代码示例:

 1 #include <iostream>
 2 #include <iomanip>
 3 #include <cstring>
 4 #include <cmath>
 5 using namespace std;
 6 class Light
 7 {
 8 private:
 9     int w;
10 public:
11     Light(){ }
12     Light(int ww):w(ww){ cout << "A " << w << "w light is created." << endl; }
13     ~Light(){ cout << "A " << w << "w light is erased." << endl;}
14     int getw() const { return w; }
15 };
16 class Chair
17 {
18 private:
19     string cl;
20 public:
21     Chair(){ }
22     Chair(string c):cl(c){ cout << "A " << cl << " chair is created." << endl; }
23     ~Chair(){ cout << "A " << cl << " chair is created." << endl;}
24     string getcl() const { return cl; }
25 };
26  
27 class ClassRoom
28 {
29 private:
30     int lnum, cnum;
31      Light lig;
32     Chair cha;
33 public:
34     ClassRoom(){ }
35     ClassRoom(int ln,int cn,int w,string c ): lig(w), cha(c),lnum(ln), cnum(cn)
36     {
37         cout << "A classroom having " << lnum << " lights and " << cnum << " chairs is created." << endl;
38     }
39     ~ClassRoom(){ cout << "A classroom having " << lnum << " lights and " << cnum << " chairs is erased." << endl;}
40 };
41  
42 int main()
43 {
44     int nl, nc;
45     int w;
46     string color;
47     cin>>w>>color;
48     Light light(w);
49     Chair chair(color);
50     cin>>nl>>nc;
51     cin>>w>>color;
52     ClassRoom room(nl, nc, w, color);
53     return 0;
54 }

problem c:  是否回文数?

description :

定义Data类,有一个int类型的属性。定义其构造函数、setValue函数和isPalindrome函数,其中setValue函数用于设置属性值,isPalindrome用于判断该属性值是否为回文数。判断回文数时,不考虑数的符号。

输入:

若干个int类型范围内的整数

输出:

每个输入对应一行输出,如果对应的输入是回文数,则输出Yes,否则输出No。

代码演绎:

 1 #include <iostream>
 2 #include <iomanip>
 3 #include <cstring>
 4 #include <cmath>
 5 using namespace std;
 6 class Data
 7 {
 8 private:
 9     int data;
10 public:
11     Data(int d = 0) : data(d) { }
12     ~Data(){ }
13 public:
14     void setValue(int v) { data = v; }
15     bool isPalindrome() const
16     {
17         int temp;
18         temp = data;
19         if(data < 0 ) temp = -temp;
20         int tt[100];
21         int i = 0;
22         while(temp != 0)
23         {
24           tt[i] = temp % 10;
25           temp /= 10;
26           i++;
27         }
28                 for(int j = 0, k = i-1; j < i;j++,k-- )
29                     if(tt[j] != tt[k])
30                       return false;
31            return true;
32     }
33 };
34 int main()
35 {
36     Data data;
37     int v;
38     while (cin>>v)
39     {
40         data.setValue(v);
41         if (data.isPalindrome())
42             cout<<"Yes"<<endl;
43         else
44             cout<<"No"<<endl;
45     }
46     return 0;
47 }

 

 problem d:Base 与 Derived

description:

定义Base和Derived类,Derived类是Base类的子类,两个类都只有1个int类型的属性。定义它们的构造函数和析构函数,输出信息如样例所示。

input;

输入2个整数。

output:

见样例

代码样例:

 1 #include <iostream>
 2 #include <iomanip>
 3 #include <cstring>
 4 #include <cmath>
 5 using namespace std;
 6 class Base
 7 {
 8 private:
 9     int bs;
10 public:
11     Base(int b = 0):bs(b) { cout << "Base " << bs << " is created." << endl; }
12     ~Base() { cout << "Base " << bs << " is created." << endl;}
13 };
14 class Derived:public Base
15 {
16 private:
17     int de;
18 public:
19     Derived(int x, int y):Base(x),de(y) { cout << "Derived " << de << " is created." << endl; }
20     ~Derived(){ cout << "Derived " << de << " is created." << endl; }
21 };
22 int main()
23 {
24     int a, b;
25     cin>>a>>b;
26     Base base(a);
27     Derived derived(a, b);
28     return 0;
29 }

problem e: 类模板sample

description:

定义类模板Sample,设模板参数为T,则Sample类只有一个T类型的属性。定义其构造函数、拷贝构造函数,输出与样例类似的信息。定义show函数,用于显示属性值(只输出属性值)。定义add函数,将当前对象与Sample类的另一个对象的属性值相加,和仍存入当前对象。

input:

输入2个int类型整数、2个double类型实数。

代码示例:

 1 #include <iostream>
 2 #include <iomanip>
 3 #include <cstring>
 4 #include <cmath>
 5 using namespace std;
 6 template <class T>
 7 class Sample
 8 {
 9 private:
10     T t;
11 public:
12     Sample(T tt) : t(tt){ cout << "Sample " << t << " is created." << endl; }
13     Sample(const Sample & s):t(s.t) { cout << "Sample " << t << " is copied." << endl;}
14     ~Sample() { }
15 public:
16     void show()const{ cout << t << endl; }
17     void add(Sample s){ t += s.t; }
18 };
19  
20  
21 int main()
22 {
23     int a, b;
24     double c, d;
25     cin>>a>>b>>c>>d;
26     Sample<int> s1(a), s2(b), s3(s1);
27     Sample<double> s4(c), s5(d), s6(s5);
28     s1.add(s2);
29     s1.show();
30     s5.add(s4);
31     s5.show();
32     return 0;
33 }

 

posted on 2019-05-28 16:38  pxxfxxxxx  阅读(277)  评论(0编辑  收藏  举报