Question

C++中静态成员的问题，请问这段程序哪里出错了？？

#include<iostream.h>
class point
{ int x,y;
static int count;
public:
point(int xx=0,int yy=0)
{x=xx; y=yy; count++;}
~point(){count--};
static int getcount()
{return count;}}
int point::count=0;
void main()
{cout<<point::getcount()<<endl; }

倒数第三行报错，error C2371: 'private: static int point::count' : redefinition; different basic types
但是count作为静态成员，不是只能在类外初始化么？？这不算再定义吧……
不懂了。。求指教

Answer 1

一个小错误。
类定义结束的右大括号后面应该有个分号。你少了这个分号。
#include<iostream.h>
class point
{ int x,y;
static int count;
public:
point(int xx=0,int yy=0)
{x=xx; y=yy; count++;}
~point(){count--;}
static int getcount()
{return count;}
};
int point::count=0;
void main()
{cout<<point::getcount()<<endl; }

Answer 2

~point(){count--};这个应该是~point(){count--;}这样吧

至于你的count，在class的大括号后面加一个分号试试
也就是{return count;}}改成{return count;}};

Answer 3

class point
{ int x,y;
static int count;
public:
point(int xx=0,int yy=0)
{x=xx; y=yy; count++;}
~point(){count--};<---------------分号你写外面？
static int getcount()
{return count;}}<--------------类定义结束你不加分号？
int point::count=0;
void main()
{cout<<point::getcount()<<endl; }

Answer 4

类定义完了之后要加一个分号……否则倒数第三行的意思就是point int point::count=0; 这显然是不合法的

Answer 5

#include<iostream.h>
class point
{ int x,y;
static int count;
public:
point(int xx=0,int yy=0)
{x=xx; y=yy; count++;}
~point(){count--;}
static int getcount()

{return count;}
};

int point::count=0;
void main()
{cout<<point::getcount()<<endl; }