ccsun40 :cpp % cat -n mannew.h
     1  //Interface file for "mankind" and "animal" classes
     2  class animal {
     3          int pv1;
     4          float pv2;
     5      protected:
     6          int pt1[5];
     7      public:
     8          animal(int = 38);
     9          float pb1;
    10          int pb2[9];
    11          void talk(void);
    12  };
    13  
    14  class mankind:public animal{
    15          char * pv3;
    16      public:     
    17          mankind(char * ="NoName");       // Constructor
    18          ~mankind();             // Destructor
    19          int pb3[8];
    20          void talk(void);
    21  };
ccsun40 :cpp % cat -n manlib.C
     1  // Implementation file for "animal" and "mankind"
     2  #include <stdio.h>
     3  #include <iostream.h>
     4  #include "mannew.h"
     5   animal::animal(int x){
     6          pv1=x;
     7          pv2=45.67;
     8          this->pb1=135.246;
     9          for (int i=0; i<9; i++) pb2[i]=i+1;
    10          //pb2={ 1,2,3,4,5,6,7 ,8,9};
    11    cout<<" Animal shows up\n";
    12  };
    13  void animal::talk(void)
    14  {
    15   cout << " animal talk, pv1=" << dec <<pv1 <<"=0x" << hex << pv1 <<"\n";
    16   cout << " \t pv2=" << pv2 <<"\n";
    17   cout << " \t pb1=" << pb1 <<"\n";
    18   cout << " \t pb2[6]=" << pb2[6] <<"\n";
    19  };
    20  mankind::mankind(char * name){
    21          pv3=name;
    22          cout << " mankind "<< pv3 << " appears\n";
    23  }
    24  mankind::~mankind(void){
    25          cout << " %%% mankind "<< this->pv3 << " is dying \n";
    26  }
    27  void mankind::talk(void)
    28  {
    29    // cout << " mankind talk, pv1=" << pv1 <<"\n";
    30    // cout << " mankind talk, pb2=" << pb2 <<"\n";
    31    // cout << " mankind talk, pb2=" << animal::pb2 <<"\n";
    32    cout << " mankind talk, pb2[0]=" << pb2[0] <<"\n";
    33   cout << " mankind talk, pv3=" << pv3 <<"\n";
    34   cout << " mankind talk, pb3[3]=" << pb3[3] <<"\n";
    35  };
ccsun40 :cpp % g++ -c manlib.C
               (此會生出 manlib.o)
               (如果你願意, 可將之做成 library, 則 manlib.C 就不用給人家
                見下一頁最後)




ccsun40 :cpp % cat -n mannew.C
     1  #include <stdio.h>
     2  #include <iostream.h>
     3  #define call
     4  #include "mannew.h"
     5  
     6  animal aa1(123),aa2(456);
     7  mankind * mm1, *mm2;
     8  void onlyasub(void)
     9  { mankind nobody;
    10    cout << " Now in routine onlyasub\n";
    11  }
    12  main(){
    13    aa1.talk();
    14    cout << "Welcome to C++\n";
    15    call onlyasub();
    16    mm1= new mankind("Chang-3");
    17    mm2= new mankind("Lee-4");
    18    cout << "mm1->pb1=" << mm1->pb1 << "\n";
    19    cout << " (Let mm1 talk)\n";
    20    mm1->talk();
    21    delete mm2;
    22    cout << " (and then Let mm1 talk by animal method)\n";
    23    mm1->animal::talk();
    24    return(0);
    25  }
ccsun40 :cpp % g++ mannew.C manlib.o
ccsun40 :cpp % a.out
 Animal shows up
 Animal shows up
 animal talk, pv1=123=0x7b
         pv2=45.67
         pb1=135.246
         pb2[6]=7
Welcome to C++
 Animal shows up
 mankind NoName appears
 Now in routine onlyasub
 %%% mankind NoName is dying 
 Animal shows up
 mankind Chang-3 appears
 Animal shows up
 mankind Lee-4 appears
mm1->pb1=135.246
 (Let mm1 talk)
 mankind talk, pb2[0]=1
 mankind talk, pv3=Chang-3
 mankind talk, pb3[3]=7fffffe
 %%% mankind Lee-4 is dying 
 (and then Let mm1 talk by animal method)
 animal talk, pv1=38=0x26
         pv2=45.67
         pb1=135.246
         pb2[6]=7
ccsun40 :cpp % exit
  如何在Unix上造library?
      very simple, 例如:
           g++ -c manlib.C     (翻譯出 manlib.o)
           ar r libanim.a manlib.o   (archive 造出 Library  libanim.a )
           ranlib libanim.a    (使它 link 時較快)
       阿這樣用:  
                g++ mannew.C -L. -lanim
                ( -L. 表示要在 current working directory 找 library,
                  -lanim 表示要找的 library 名為 libanim.a )
     (For more information, see "man ar"  and "man ranlib")