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  1. #include <iostream>
  2. using namespace std;
  3. class A {
  4.     public:
  5.     static A* me;
  6.     int a;
  7.     A();
  8.     ~A()
  9.     {
  10.         cout << "A::~A()" << "\n";
  11.         a = -1;
  12.     }
  13.     void FooFunc()
  14.     {
  15.         A temp9696;
  16.         temp9696.a = 9696;
  17.         cout << "③ A::me->a = " << A::me->a << "\n";
  18.     }
  19.     int Diff(A inputA)
  20.     {
  21.         return a - inputA.a;
  22.     }
  23. };
  24. A* A::me;
  25. A::A(){
  26.    cout << "A::A()" << "\n"; 
  27.     me = this;
  28. }
  29. int main() {
  30.     // your code goes here
  31.     A* a1919 = new A;
  32.     a1919->a = 1919;
  33.     cout << "① A::me->a = " << A::me->a << "\n";
  34.     A* a1818 = new A;
  35.     a1818->a = 1818;
  36.     cout << "② A::me->a = " << A::me->a << "\n";
  37.     A::me->FooFunc();
  38.     cout << "④ A::me->a = " << A::me->a << "\n";
  39.     {
  40.          A temp4545;
  41.          temp4545.a = 4545;
  42.          cout << "⑤ A::me->a = " << A::me->a << "\n";
  43.     }
  44.     cout << "⑥ A::me->a = " << A::me->a << "\n";
  45.     A::me->a = 1919;
  46.     cout << "⑦ A::me->Diff(*A::me) = " << A::me->Diff(*A::me) << "\n";
  47.     cout << "⑧ A::me->a = " << A::me->a << "\n";
  48.     cout << "hage\n";
  49.     return 0;
  50. }
Success #stdin #stdout 0s 3428KB
comments ()
stdin
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Standard input is empty
stdout
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A::A()
① A::me->a = 1919
A::A()
② A::me->a = 1818
A::A()
③ A::me->a = 9696
A::~A()
④ A::me->a = -1
A::A()
⑤ A::me->a = 4545
A::~A()
⑥ A::me->a = -1
⑦ A::me->Diff(*A::me) = 0
A::~A()
⑧ A::me->a = -1
hage
https://ideone.com/gt21RS
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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