牛客C++练习册（一）

 #include <iostream>

    
 using namespace std;
    
  
    
 class A
    
 {
    
 private:
    
     static int a,b;
    
 public:
    
     A()
    
     {
    
     a++;
    
     cout<<"A调用构造函数: "<<a<<endl;
    
     }
    
  
    
     Show()
    
     {
    
     cout<<"I am a class project!"<<endl;
    
     }
    
  
    
     ~A()
    
     {
    
     b++;
    
     cout<<"A调用析构函数: "<<b<<endl;
    
     }
    
 };
    
  
    
 int A::a=0;
    
 int A::b=0;