holy error messages batman

well everyone heres the code and I gotta tell yah this one has got me stumped

Code:

#include <iostream> 
#include <string>     

using namespace std;


class two
{
private: float x, y;
public:
	void read()
	{
		cout<<"Enter the x cooridnate: "; cin>>x;       //enter the value for the x coord
		cout<<"Enter the y coordinate: "; cin>>y;		//enter the value for the y coord
	}

	void show()
	{
	cout<<"the x and y of point a are("<<x<<" , "<<y<<")"<<endl;  //shows the value of the x and y coord
													
	}

friend void show(two p)
	{
	cout<<"the x and y of point b are("<<p.x<<" , "<<p.y<<")"<<endl;
	}
friend float distance(two p)
	{
	float d=((0-p.x)(0-p.x)) + (0-p.y)(0-p.y));
	cout<<sqrt(d);
	}
	
};
void main()
{
	two a, b;//declares two objects a and b
	a.read();//read in x and y values for object a
	b.read();//read in x and y values for object b
    a.show();//show x and y values for object a
	show(b);//show x and y values for object b
	cout<<"The distance from point(0,0) to point a is" <<distance(b);
}

well according to the info I got on friend functions this stuff should work man but I keep getting this crazy error message that says internal compiler error. Now the one question that I have what exactly am I missing here

just right off the top of me head.. i can see that you forgot to #include<cmath> whilst using the sqrt() function.

I have change some statements, now it's ok.

Code:

#include <iostream> 
#include <string>
  
using namespace std;

class two
{
private: float x, y;
public:
  void read()
  {
    cout<<"Enter the x cooridnate: "; cin>>x;       
    cout<<"Enter the y coordinate: "; cin>>y;  
  }

  void show()
  {
  cout<<"the x and y of point a are("<<x<<" , "<<y<<")"<<endl;  
  }

friend void show(two p)
  {
  cout<<"the x and y of point b are("<<p.x<<" , "<<p.y<<")"<<endl;
  }
friend float distance(two p)
  {
  float d=((0-p.x)*(0-p.x) + (0-p.y)*(0-p.y)); //add * between )(
  return sqrt(d);    //chang cout to return
  }
  
};
int main()
{
  two a, b;    //why define two objects but output one ?               
  a.read();
  b.read();
    a.show();
  show(b);
  cout<<"The distance from point(0,0) to point a is " ;
    cout<<distance(a);  
  
    cin.ignore();  
    cin.get();
  
  return 0;
}

Code:

#include<iostream> 
#include<string>
#include<cmath>
  
using namespace std;

class two
{
private: float x, y;
public:
  void read()
  {
    cout<<"Enter the x cooridnate: "; cin>>x;       
    cout<<"Enter the y coordinate: "; cin>>y;  
  }

void show()
  {
  cout<<"the x and y of point a are("<<x<<" , "<<y<<")"<<endl;  
  }

void show(two p)
  {
  cout<<"the x and y of point b are("<<p.x<<" , "<<p.y<<")"<<endl;
  }
float distance(two p)
  {
  float d=((0-p.x)*(0-p.x) + (0-p.y)*(0-p.y)); //add * between )(
  return sqrt(d);    //chang cout to return
  }
  
};
int main()
{
  two a, b;    //why define two objects but output one ?               
  a.read();
  b.read();
   a.show();
   b.show(b);
  cout<<"The distance from point(0,0) to point a is " ;
    cout<<a.distance(a);  
  
    cin.ignore();  
    cin.get();
  
  return 0;
}

#include<cmath>

why not include this statement, but result is correct?
so I remove this statement.

my bad.