第5周项目--程序阅读

#include<iostream>
using namespace std;
class myClass
{
public:
    myClass(){ number++;}
    ~myClass(){ number--;}
    static int number;
};
 
int myClass::number=0;
 
int main()
{
    myClass *ptr;
    myClass A,B;
    myClass *ptr_Arr=new myClass[3];
    ptr=ptr_Arr;
    myClass C;
    cout<<myClass::number<<endl;
    delete []ptr;
    return 0;
}

#include <iostream>
using namespace std;
class Test{
   private:
      static int val;
      int a;
   public:
      static int func();
      static void sfunc(Test &r);
}; 
 
int Test::val=20;
int Test::func()
{
   val+=val;
   return val;
}
 
void Test::sfunc (Test &r)
{
    r.a=25;
    cout<<"Result3="<<r.a<<endl;
}
 
int main(){
  cout <<"Resultl="<<Test::func()<<endl;
  Test a;
  cout<<"Result2="<<a.func()<<endl;
  Test::sfunc (a);
  return 0;
}