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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. class A{
  6. public:
  7.     int x, y, z;
  8.  
  9.     A() {
  10.         this->x = 0;
  11.         this->y = 0;
  12.         this->z = 0;
  13.     }
  14.  
  15.     ~A() { }
  16.  
  17.     void init (int x_in, int y_in, int z_in){
  18.         this->x = x_in;
  19.         this->y = y_in;
  20.         this->z = z_in;
  21.     }
  22.  
  23.     int sum(){
  24.         return this->x + this->y + this->z;
  25.     }
  26.  
  27.     void show_result() {
  28.         int result = sum();
  29.         cout << "sum = " << result << endl;
  30.     }
  31. };
  32.  
  33.  
  34. enum { A_CAR, A_CAT, A_CANADA, A_NUM };
  35.  
  36. class B {
  37. public:
  38.     A A_arr[A_NUM];
  39.  
  40.     B() {
  41.         A_arr[A_CAR].init(0, 1, 2);
  42.         A_arr[A_CAT].init(1, 2, 3);
  43.         A_arr[A_CANADA].init(8, 7, 6);
  44.     }
  45.  
  46.     ~B() {}
  47.  
  48.     void show_all_result() {
  49.         for (int i = 0; i < A_NUM; i++) {
  50.         	A_arr[i].show_result();
  51.         }
  52.     }
  53. };
  54.  
  55.  
  56. int main() { 
  57.  
  58.     B obj_B;
  59.  
  60.     obj_B.show_all_result();
  61. }
  62.  
Success #stdin #stdout 0s 4376KB
comments (?)
stdin 
Standard input is empty
stdout 
sum = 3
sum = 6
sum = 21
https://ideone.com/1Q92gH
版本2, 利用array 與 enum搭配
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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