久久精品国产欧美激情,欧美日韩午夜精品,在线观看国产成人av片

I need time----------------> Hsssssss@C++

每天進(jìn)步一...................................

用面向?qū)ο笳Z(yǔ)言實(shí)現(xiàn)一個(gè)計(jì)算器控制臺(tái)程序

1

#include <iostream>
2

using namespace std;
3

//Operation 運(yùn)算類(lèi)
4

class Operation{
5

double m_numberA;
6

double m_numberB;
7

public:
8

void SetNumA(double numA) { m_numberA = numA;}
9

void SetNumB(double numB) { m_numberB = numB;}
10

double GetNumA(void) const { return m_numberA;}
11

double GetNumB(void) const { return m_numberB;}
12

virtual double GetResult() = 0;
13

};
14

class OperationAdd:public Operation{
15

public:
16

double GetResult(){
17

return GetNumA() + GetNumB();
18

}
19

};
20

class OperationSub:public Operation{
21

public:
22

double GetResult(){
23

return GetNumA() - GetNumB();
24

}
25

};
26

class OperationMul:public Operation{
27

public:
28

double GetResult(){
29

return GetNumA() * GetNumB();
30

}
31

};
32

class OperationDiv:public Operation{
33

public:
34

double GetResult(){
35

if (GetNumB() == 0)
36

throw "numB cannot be zero!";
37

return GetNumA() / GetNumB();
38

}
39

};
40

class OperationFactory{
41

public:
42

static Operation* CreateOperate(char oper){
43

Operation *poper = NULL;
44

switch (oper){
45

case '+':
46

poper = new OperationAdd;
47

break;
48

case '-':
49

poper = new OperationSub;
50

break;
51

case '*':
52

poper = new OperationMul;
53

break;
54

case '/':
55

poper = new OperationDiv;
56

break;
57

}
58

return poper;
59

}
60

};
61

int main()
62

{
63

cout<<"input A:";
64

double numA;
65

cin>>numA;
66

cout<<"input operator:";
67

char oper;
68

cin>>oper;
69

cout<<"input B:";
70

double numB;
71

cin>>numB;
72

Operation *poper = OperationFactory::CreateOperate(oper);
73

poper->SetNumA(numA);
74

poper->SetNumB(numB);
75

cout<<poper->GetNumA()<<' '<<oper<<' '<<poper->GetNumB()<<" = "<<poper->GetResult()<<endl;
76

system("pause");
77

return 0;
78

}

posted on 2011-08-12 14:18 Hsssssss 閱讀(672) 評(píng)論(1) 編輯收藏引用所屬分類(lèi): C++代碼

評(píng)論

# re: 用面向?qū)ο笳Z(yǔ)言實(shí)現(xiàn)一個(gè)計(jì)算器控制臺(tái)程序 2011-08-12 22:16 Hsssssss

低耦合回復(fù) 更多評(píng)論

刷新評(píng)論列表

只有注冊(cè)用戶登錄后才能發(fā)表評(píng)論。


相關(guān)文章: I am hs----------->hs am I 二叉樹(shù)非遞歸層次遍歷二叉樹(shù)非遞歸后序遍歷二叉樹(shù)非遞歸先序，中序用面向?qū)ο笳Z(yǔ)言實(shí)現(xiàn)一個(gè)計(jì)算器控制臺(tái)程序找出兩字符串的最大公共字串將10進(jìn)制數(shù)轉(zhuǎn)換成2進(jìn)制,8進(jìn)制,16進(jìn)制輸出將16進(jìn)制字符串轉(zhuǎn)換成10進(jìn)制數(shù) 給出年月日,算出這是一年中的第幾天判斷數(shù)組是否遞增

網(wǎng)站導(dǎo)航: 博客園 IT新聞 BlogJava 博問(wèn) Chat2DB 管理

<

2025年12月

>

日

一

二

三

四

五

六

30

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

1

2

3

4

5

6

7

8

9

10

導(dǎo)航

統(tǒng)計(jì)

隨筆 - 0
文章 - 22
評(píng)論 - 2
引用 - 0

常用鏈接

留言簿

文章分類(lèi)

文章檔案

收藏夾

C++(10) (rss)