点列表编译错误了。求助
//PointlList.h
const int maxListSize=10;

class Point
{
public:
Point(float x0=0,float y0=0)
{
x=x0;y=y0;
}
float x,y;
};

class PointList()
{
public:
PointList();

void append(Point newPoint);
void clear();

bool isEmpty() const;
bool isFull() const;

void gotoBeginning();
void gotoEnd();
bool gotoNext;
bool gotoPrior();
Point getCursor() const;

void printPoint(Point a);
void showStructure() const;

private:
int size,cursor;//cursor is the index of a point array
Point points[maxListSize];
};
//PointList.cpp
#include <iostream>
#include "PointList.h "

using namespace std;

PointList::PointList()
{
points[maxListSize];
cursor=null;
size=0;
}

void PointList::append(Point newPoint)
{
if(size <=maxListSize)
{
if(cursor==null)
{
points[0]=newPoint;
cursor=0;
}
else {
points[cursor+1]=newPoint;
cursor++;
}
size++;
}else
cout < < "The list is too fullto add a new point. " < <endl;
}

void PointList::clear()
{
int i=0;
while(i=0;i <cursor+1;i++)
{
points[i].x=null;
points[i].y=null;
}
size=0;
curse=null;
}

bool PointList::isEmpty() const
{
return size==0;
}

bool PointList::isFull() const
{
return size==maxListSize;
}

void PointList::gotoBeginning()
{
cursor=0;
}

void PointList::gotoEnd()
{
cursor=size-1;
}

bool PointList::gotoNext()
{
if((cursor!=size-1)&&(size!=0))
{
cursor=cursor++;
return true;
}
else return false;
}

bool PointList::gotoPrior()
{
if((cursor!=0)&&(size!=0))
{
cursor--;
return true
}else return false;
}

Point PointList::getCursor() const
{
return points[curse];
}

void PointList::printPoint(Point a)
{
cout < < "( " < <a.x < < ", " < <b.x < < ") " < <endl;
}

void PointList::showStructure() const
{
if(size==0)
cout < < "Empty list. " < <endl;
else{
int i=0;
while(i=0;i <size;i++)
{
printPoint(points[i]);
}
}
}

大致有三类错误：
1.PointList is not a class
2.modifiers are not allowed on nonemember function
3.missing ; before{
都是莫名奇怪的错误。
谢谢大牛，不胜感激～

------解决方案--------------------

语法问题很多，


.h
----------

const int maxListSize = 10;

class Point
{
public:
Point(float x0=0,float y0=0)
{
x=x0;y=y0;
}
float x,y;
};

class PointList
{
public:
PointList();

void append(Point newPoint);
void clear();
bool isEmpty() const;
bool isFull() const;
void gotoBeginning();
void gotoEnd();
// function
bool gotoNext();
bool gotoPrior();
Point getCursor() const;
void printPoint(Point a);
// 修改了size的值，不能声明为cosnt函数
void showStructure();
private:
int size;
int cursor;//cursor is the index of a point array
Point points[maxListSize];
};


.cpp
---------------

#include <iostream>
using namespace std;

PointList::PointList()
{
points[maxListSize];
cursor= 0; //null也和NULL不同
size=0;
}

void PointList::append(Point newPoint)
{
if(size <= maxListSize)
{
if(cursor == 0)
{
points[0]=newPoint;
cursor=0;
}
else {
points[cursor+1]=newPoint;
cursor++;
}
size++;
}else
cout < < "The list is too fullto add a new point. " < <endl;
}

void PointList::clear()
{
int i=0;
// while ??
for(i = 0; i < cursor+1; i++)
{
points[i].x = 0;
points[i].y = 0;
}
size = 0;
cursor = 0;
}

bool PointList::isEmpty() const
{
return size==0;
}

bool PointList::isFull() const
{
return size==maxListSize;
}

void PointList::gotoBeginning()
{
cursor=0;
}

void PointList::gotoEnd()
{
cursor=size-1;
}

bool PointList::gotoNext()
{
if((cursor!=size-1)&&(size!=0))
{
cursor=cursor++;
return true;
}
else
return false;
}

bool PointList::gotoPrior()
{
if((cursor!=0)&&(size!=0))
{
cursor--;
// 少了;
return true;
}
else
return false;
}

Point PointList::getCursor() const
{
// curse?
return points[cursor];
}

void PointList::printPoint(Point a)
{
// b?
cout < < "( " < <a.x < < ", " < <a.y < < ") " < <endl;
}

void PointList::showStructure()
{
// modify size
if(size == 0)
cout < < "Empty list! " < <endl;
else
{
int i = 0;
// 看下while的用法
for(i = 0;i < size; i++)
{
printPoint(points[i]);
}
}
}