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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <vector>
  4. using namespace std;
  5.  
  6. #include <iostream>
  7.  
  8. using namespace std;
  9.  
  10. class A {
  11. public:
  12.     static vector<A*> A_vector;
  13.     int x, y, z;
  14.  
  15.     A() {
  16.         this->x = 0;
  17.         this->y = 0;
  18.         this->z = 0;
  19.         A_vector.push_back(this);
  20.     }
  21.  
  22.     ~A() { }
  23.  
  24.     void init(int x_in, int y_in, int z_in) {
  25.         this->x = x_in;
  26.         this->y = y_in;
  27.         this->z = z_in;
  28.     }
  29.  
  30.     int sum() {
  31.         return this->x + this->y + this->z;
  32.     }
  33.  
  34.     void show_result() {
  35.         int result = sum();
  36.         cout << "sum = " << result << endl;
  37.     }
  38. };
  39. vector<A*> A::A_vector;
  40.  
  41.  
  42. class B {
  43. public:
  44.     A A_car, A_cat, A_canada;
  45.  
  46.     B() {
  47.         A_car.init(0, 1, 2);
  48.         A_cat.init(1, 2, 3);
  49.         A_canada.init(8, 7, 6);
  50.     }
  51.  
  52.     ~B() {}
  53.  
  54.     void show_all_result() {
  55.         for (int i = 0; i < A::A_vector.size(); i++)
  56.             A::A_vector[i]->show_result();
  57.     }
  58. };
  59.  
  60.  
  61. int main() {
  62.  
  63.     B obj_B;
  64.  
  65.     obj_B.show_all_result();
  66.     printf("done\n");
  67.     return 0;
  68. }
  69.  
  70.  
Success #stdin #stdout 0s 4408KB
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stdin
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Standard input is empty
stdout
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sum = 3
sum = 6
sum = 21
done
https://ideone.com/z87uYQ
static member variable constructor
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
secret

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