欧美日韩精品系列,亚洲欧洲久久,久久久久久**毛片大全

用面向對象語言實現一個計算器控制臺程序

#include <iostream>
2

using namespace std;
3

//Operation 運算類
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(661) 評論(1) 編輯收藏引用所屬分類: C++代碼

只有注冊用戶登錄后才能發表評論。
【推薦】100%開源！大型工業跨平臺軟件C++源碼提供，建模，組態！

相關文章: I am hs----------->hs am I 二叉樹非遞歸層次遍歷二叉樹非遞歸后序遍歷二叉樹非遞歸先序，中序用面向對象語言實現一個計算器控制臺程序找出兩字符串的最大公共字串將10進制數轉換成2進制,8進制,16進制輸出將16進制字符串轉換成10進制數給出年月日,算出這是一年中的第幾天判斷數組是否遞增

網站導航: 博客園 IT新聞 BlogJava 博問 Chat2DB 管理

# re: 用面向對象語言實現一個計算器控制臺程序 2011-08-12 22:16 Hsssssss

用面向對象語言實現一個計算器控制臺程序

評論

導航

統計

常用鏈接

留言簿

文章分類

文章檔案

收藏夾

搜索

最新評論