這是第一次在博客上發表隨筆，希望可以敦促自己不要浪費時間，努力提升基本功。

 1 #include <iostream>
 2 
 3 class CPU
 4 {
 5     enum CPU_rank{p1=1,p2,p3,p4,p5,p6,p7};
 6 public:
 7     CPU()= default;
 8     CPU(enum CPU_rank);
 9     ~CPU(){}
10     void run(){std::cout<<"CPU運行";}
11     void stop(){std::cout<<"CPU停止"
 
;}
12 };
13 
14 enum RAM_type {DDR4=1,DDR3,DDR2};
15 class RAM
16 {
17     enum RAM_type type;
18     int size;
19     float ping;
20 public:
21     RAM()= default;
22     RAM(enum RAM_type,int size,float ping);
23     ~RAM(){}
24     void setType(RAM_type t){ type=t;}
25     inline void run(){std::cout<<"
 
RAM運行";}
26     inline void stop(){std::cout<<"RAM停止";}
27 };
28 
29 enum CD_ROM_type{SATA,USB};
30 class CD_ROM
31 {
32 
33     int size;
34     enum install{external=1,built_in};
35 public:
36     CD_ROM()= default;
37     CD_ROM(enum install,enum CD_ROM_type, int size);
38     ~CD_ROM(){}
39
 
     inline void run(){std::cout<<"CD_ROM運行/n";}
40     inline void stop(){std::cout<<"CD_ROM停止/n";}
41 };
42 
43 class COMPUTER
44 {
45     CPU myCpu;
46     RAM myRam;
47     CD_ROM myCdRom;
48     float prize;
49 public:
50     COMPUTER()= default;
51     COMPUTER(CPU c,RAM r,CD_ROM cd,float prize=0)
52             :myCpu(c),myCdRom(cd),myRam(r)
53     {
54         std::cout<<"COMPUTER創建成功";
55     }
56     ~COMPUTER(){}
57     inline void run(){std::cout<<"COMPUTER運行";}
58     inline void stop(){std::cout<<"COMPUTER停止";}
59 };
60 
61 int main() {
62     RAM myram;
63     myram.setType(DDR2);
64     COMPUTER mycomputer;
65     mycomputer.run();
66     mycomputer.stop();
67 }

C++組合類的簡單練習