Redefinition of "class Point"

Question

i'm doing some homework about OOP, i have to write 2 header files: Point.h and Triangle.h, and also define the methods in Point.cpp and Triangle.cpp.

I'm from Mexico so my code is a mix between english and spanish. When i run it, i get the following error:

PS C:\Users\ikerc\OneDrive\Escritorio\C++\TC1033\Clases\Act6> g++ main.cpp Point.cpp Triangle.cpp

In file included from Triangle.h:3, from main.cpp:3: Point.h:5:7: error: redefinition of 'class Point' 5 | class Point{ | ^~~~~ In file included from main.cpp:2: Point.h:5:7: note: previous definition of 'class Point' 5 | class Point{

Here are all the files that i used:

Point.h

#include<iostream>
#include<cmath>

class Point{

    public:
        Point(double, double);
        Point();
        double getX();
        double getY();
        double getDistance();
        void setX(double);
        void setY(double);
        double distance(Point);

    protected:
        double x;
        double y;
        double distancia;
      


};

Point.cpp

#include<iostream>
#include"Point.h"


Point::Point(double _x, double _y){
    x = _x;
    y = _y;
}

double Point::getX(){
    return x;
}

double Point::getY(){
    return y;
}

double Point::getDistance(){
    return distancia;
}

void Point::setX(double _x){
    x = _x;
}

void Point::setY(double _y){
    y = _y;
}

double Point::distance(Point Punto){
   
    distancia = sqrt(pow(Punto.getX() - x, 2) + pow(Punto.getY() - y, 2)); //Distancia entre puntos formula
    return distancia;
}

Triangle.h

#include<iostream>
#include"Point.h"

class Triangle: public Point{
    public:
        Triangle(Point, Point, Point);
        Triangle();
        double perimeter();
        double area();

    private:
        Point vertex1;
        Point vertex2;
        Point vertex3;
        double sideA;
        double sideB;
        double sideC;
        double areaT;
        double perimeterT;
};

Triangle.cpp

#include<iostream>
#include"Triangle.h"
#include<cmath>

Triangle::Triangle(Point _vertex1, Point _vertex2, Point _vertex3){
    vertex1 = _vertex1;
    vertex2 = _vertex2;
    vertex3 = _vertex3;
}

Triangle::Triangle(){
    vertex1.setX(0);
    vertex1.setY(0);
    vertex2.setX(50);
    vertex2.setY(30);
    vertex3.setX(25);
    vertex3.setY(10);
}

double Triangle::perimeter(){
    sideA = vertex1.distance(vertex2);
    sideB = vertex2.distance(vertex3);
    sideC = vertex3.distance(vertex1);


    perimeterT = sideA + sideB + sideC;
    return perimeterT;
}

double Triangle::area(){

     double s; 
     s = (perimeterT/2);
     areaT = sqrt(s * (s - sideA) * (s - sideB) * (s - sideC)); // Formula Heron
     return areaT;

}

main.cpp

#include<iostream>
#include"Point.h"
#include"Triangle.h"



int main(){
    Point Punto1(7, 5);
    Point Punto2(4, 1);
    Triangle Tr;

    Punto1.distance(Punto2);
    std::cout<<"\n\nLa distancia entre los puntos es: "<<Punto1.getDistance();
    std::cout<<"El area del triangulo es: "<<Tr.area();

    return 0;
}

I already tried using #pragma once at the top of Point.h, but it shows me this error: C:\Users\ikerc\AppData\Local\Temp\cchgOY8H.o:Triangle.cpp:(.text+0x22): undefined reference to `Point::Point()'