短短代码 一大堆有关问题

短短代码 一大堆问题啊
#include <iostream>
#include <fstream>
#include <string>
//#include <vector>
//#include   <iosfwd>
using   namespace   std;

class   BookMessage{

static   int   storage;
static   int   capacity;
string   bookName;
int   bookNum;
public:
BookMessage(string   name,int   num):bookName(name),bookNum(num){
storage=0;
capacity=0;
storage++;
capacity++;
}
~BookMessage(){
}
friend   ostream&   operator < <(ostream&,BookMessage&);
};

ofstream&   operator < <(ofstream&   os,const   BookMessage&   bkm){
os < <bkm.bookName < < "   " < <bkm.bookNum   < <endl;
return   os;
}

void   main(){
ofstream   bookDate( "book.dat "),iso_base::app);
BookMessage   book1( "history ",1001);
BookMessage   book2( "maths ",1242);
BookMessage   book3( "chemistry ",1239);
bookDate < <book1 < <book2 < <book3;

}

G:\CODE\homework\test1\csf.cpp(27)   :   error   C2248:   'bookName '   :   cannot   access   private   member   declared   in   class   'BookMessage '
                G:\CODE\homework\test1\csf.cpp(12)   :   see   declaration   of   'bookName '
G:\CODE\homework\test1\csf.cpp(27)   :   error   C2248:   'bookNum '   :   cannot   access   private   member   declared   in   class   'BookMessage '
                G:\CODE\homework\test1\csf.cpp(13)   :   see   declaration   of   'bookNum '
G:\CODE\homework\test1\csf.cpp(32)   :   error   C2653:   'iso_base '   :   is   not   a   class   or   namespace   name
G:\CODE\homework\test1\csf.cpp(32)   :   error   C2065:   'app '   :   undeclared   identifier


c++   primer   说   打开写入的附加模式用   ios_base::app
但系统提示找不到
还有   把所有   private   改成   public   后
去掉   ios_base::app
链接   又会出现一对错误     帮忙看看

[解决办法]
#include <iostream>
#include <fstream>
#include <string>
//#include <vector>
//#include <iosfwd>
using namespace std;

class BookMessage{

int storage;//不要static
int capacity;
string bookName;
int bookNum;
public:
BookMessage(string name,int num):bookName(name),bookNum(num){
storage=0;
capacity=0;
storage++;
capacity++;
}
~BookMessage(){
}
friend// ostream& operator < <(ostream&,BookMessage&);
ofstream& operator < <(ofstream& os,const BookMessage& bkm){
os < <bkm.bookName < < " " < <bkm.bookNum < <endl;
return os;
}
};


int main(){
ofstream bookDate( "book.dat ",ios_base::app);//ios_base,不是iso_app，注意括号匹配
BookMessage book1( "history ",1001);
BookMessage book2( "maths ",1242);
BookMessage book3( "chemistry ",1239);

bookDate < <book1 < <book2 < <book3;
return 0;
}
[解决办法]
Linking...
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/test1.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

test1.exe - 2 error(s), 0 warning(s)

VC6 编译出现了写错误

//----------------------

你工程是Application 吧...?
是console 程序..
换成console 建工程
[解决办法]
#include <iostream>
#include <fstream>
#include <string>
//#include <vector>
//#include <iosfwd>
using namespace std;

class BookMessage {
public:
BookMessage(string name, int num) :
bookName(name), bookNum(num) {
//storage=0;
//capacity=0;
storage++;
capacity++;
}
~BookMessage() {
}
friend ofstream& operator < <(ofstream&, const BookMessage&);


private:
string bookName;
int bookNum;
static int storage;
static int capacity;
};
int BookMessage::storage = 0;
int BookMessage::capacity = 0;

ofstream& operator < <(ofstream& os, const BookMessage& bkm) {
os < < bkm.bookName < < " " < < bkm.bookNum < < endl;

return os;
}

int main() {
ofstream bookDate( "book.dat ", ios_base::app);
BookMessage book1( "history ", 1001);
BookMessage book2( "maths ", 1242);
BookMessage book3( "chemistry ", 1239);

bookDate < < book1 < < book2 < < book3;

}