菜鸟问 这程序语法哪里错了，最好不改主函数
#include"iostream"
#include"iomanip"

using namespace std;
char c1=',';

class Point
{

public:
static int count1,count2;
friend void show();
friend void ShowPoint(Point &p, double x, double y);
Point (double a11,double c11);
Point(double a11);
~Point();
Point (Point &w);
Point ();
Point(const Point&);
void show()
{
cout<<std::setprecision(16)<<"Point["<<i1<<"] : "<<'('<<x1<<c1<<' '<<y1<<')'<<'\n';

}
void show()const
{
cout<<std::setprecision(16)<<"Point["<<i1<<"] : "<<'('<<x1<<c1<<' '<<y1<<')'<<'\n';

}
double x1,y1,aa1,cc1; int i1;
static void showCounter()
{
std::cout<<"Current"<<' '<<":"<<' '<<count1<<' '<< "points.\n";

}
double x(){return x1;}
double x()const{return x1;}
double x(double m){x1=m; return x1;}
double y(double n){y1=n; return y1;}
double y(){return y1;}
double y()const{return y1;}
double getX(){return x1;}
double getY(){return y1;}
double setX(double x){x1=x; return x1;}
double setY(double y){y1=y; return y1;}
Point& setPoint(double a,double b);
double setPoint(double a)
{
x1=a;y1=a;
return x1;
}
static void showSumOfPoint()
{
std::cout<<"In total : "<<count2<< " points.\n";

}
Point copy(Point p)
{
x1=p.x1;
y1=p.y1;
return *this;
}
Point inverse()
{
Point::x1=Point::x1+Point::y1;
Point::y1=Point::x1-Point::y1;
Point::x1=Point::x1-Point::y1;
return *this;
}
Point inverse(Point p)
{
p.x1=p.x1+p.y1;
p.y1=p.x1-p.y1;
p.x1=p.x1-p.y1;
return *this;
}
bool isEqual(Point p)
{
if (p.x1==Point::x1&&p.y1==Point::y1)
return true;
else
return false;
}
bool isEqual(Point p)const
{
if (p.x1==Point::x1&&p.y1==Point::y1)
return true;
else
return false;
}



};
Point::Point(const Point&p):x1(p.x1),y1:(p.y1)
{

}
Point& Point:: setPoint(double a,double b)
{
x1=a,y1=b;
}
Point::Point (double a11,double c11):x1(a11),y1(c11)
{
count2++;

}

Point::Point ():x1(0),y1(0){ count2++;}

Point::~Point(){}

Point::Point(Point &w): x1(w.x1),y1(w.y1)
{
count2++;
}
Point::Point(double a11):x1(a11),y1(a11)
{
count2++;
}
int Point::count1;
int Point::count2;
void ShowPoint(Point p)
{
cout<<std::setprecision(16)<<"Point : ("<<p.x()<<", "<<p.y()<<")"<<endl;
}
void ShowPoint(double x, double y)
{
Point p(x, y);
cout<<std::setprecision(16)<<"Point : ("<<p.x()<<", "<<p.y()<<")"<<endl;
}

void ShowPoint(Point &p, double x, double y)
{
cout<<std::setprecision(16)<<"Point : ("<<p.x(x)<<", "<<p.x(y)<<")"<<endl;
}














int main()
{
int l(0);
char c;
double a, b;
Point p, q, pt[60];
while(std::cin>>a>>c>>b)
{
if(a == b)
p.copy(pt[l].setPoint(a, b));
if(a > b)
p.copy(pt[l].setPoint(a, b).inverse());
if(a < b)
p.inverse(pt[l].setPoint(a, b));
if(a < 0)
q.copy(p).inverse();
if(b < 0)
q.inverse(p).copy(pt[l]);
pt[l++].show();
p.show();
}
q.show();
cout<<"==========gorgeous separator=========="<<endl;
double x(0), y(0);
for(int i = 0; i < l; i++)
x += pt[i].x(), y -= pt[i].y();
pt[l].x(y), pt[l].y(x);
q.copy(pt[l]).show();
for(int i = 0; i <= l; i++)
pt[i].show();
cout<<"==========gorgeous separator=========="<<endl;
const Point const_point(3, 3);
const_point.show();
for(int i = 0; i <= l; i++)
{
if(const_point.isEqual(pt[i]))
{
ShowPoint(const_point);
ShowPoint(const_point.x(), const_point.y());
ShowPoint(Point(const_point.x(), const_point.y()));
}
}
const_point.showSumOfPoint();
}


[解决办法]
相应地方改为:

C/C++ code

Point::Point(const Point&p):x1(p.x1),y1(p.y1){}Point& Point:: setPoint(double a,double b){    x1=a,y1=b;    return *this;   //这个函数其实可以不用换回的，一定要返回的话就返回这个吧}
[解决办法]
语法错误
C/C++ code
 Point::Point(const Point&p):x1(p.x1),y1:(p.y1) //多了个：  {  }