//constdest.cpp
        //Illustrating when constructors
        //and destructors are called
        #include <iostream>
            // cout, endl
        using namespace std;

        class cat{
          public:
            cat(); //make a newborn
            cat(int n);  //make a cat age n
            ~cat();
            
          private:
            int age;
          };

        cat::cat()
          {
          age=0;
          cout << "In cat default constructor. "
            << "age = " << age << endl;
          return;
          }

        cat::cat(int n)
          {
          age=n;
          cout << "In cat alternate constructor. "
            << "age = " << age << endl;
          return;
          }

        cat::~cat()
          {
          cout << "In cat DESTRUCTOR." 
            << " age = " << age << endl;
          return;
          }

        int main()
          {
          cat x,y;
          cat z(3);
          cout << "some block.\n";
            {
            cat q(4);
            cat h(10);
            cat z(7);
            }
            cout << "now a for loop\n";
            int i;
            for (i=5;i>2;i--)
              {cat k(i);}
            cout << "out of for loop\n";
            return 1;
          }