1 int g_tennis; // not use as possible
2
3 int make_world() {
4 int size = 0;
5
6 return size;
7 }
8
9 const int NUMBER = 100;
10
11 enum Color {
12 RED,
13 GREEN
14 };
15
16 typedef int Dog;
17
18 class MyClass {
19 public:
20 MyClass(int s, int num_entries = 0)
21 : size(s), num_entries_(num_entries), length_(0) {
22 int book = NUMBER;
23 book = 3;
24 }
25
26 int size;
27
28 // same as data member
29 int num_entries() const {
30 return num_entries_;
31 }
32
33 void set_num_entries(int num_entries) {
34 num_entries_ = num_entries;
35 }
36
37 // private and protected name end with underline
38 private:
39 int num_entries_;
40
41 void foo_(double world) {
42 double *pworld = &world;
43 pworld = nullptr;
44 }
45
46 protected:
47 int length_;
48 };
49
50 int main() {
51
52 return 0;
53 }
