Question

Can I get some help with this problem?

Can someone show how do this in C?

Thank you for your help.

Write a C object-oriented program that reads the coordinates of two points in the plane and shows the distance between them. In order to do that implement the class Point.

   Point{
      float x;
      float y;

      Point(): void

      set (float x, float y): void
      getX( ): float (optional implementation)
      getY( ): float (optional implementation)
      distance(Point): float
   };


In your testing program app.c, read the coordinates of the points p1 and p2, and as output print twice the distance between the points p1 and p2 in order to check that p1.distance(p2) = p2.distace(p1).



Concepts in practice: C Pointers, Pointers to function, C with classes.

Answer 1

#include <stdio.h>
#include <math.h>
#include<stdlib.h>//for dynamic memory
//class Point
//is represented using c
typedef struct {
   float x,y;  
}Point;

//method to set x,y coordinates to point
void set(Point *p, float x,float y)
{
   p->x = x;
   p->y = y;
}
//method to get x
float getX(Point *p)
{
   return p->x;
}
//method to get y
float getY(Point *p)
{
   return p->y;
}
//method to find distance between two points
float distance(Point *p1,Point *p2)
{
   float d = (getX(p2)-getX(p1))*((getX(p2)-getX(p1))) + (getY(p2)-getY(p1))*((getY(p2)-getY(p1)));
   return sqrt(d);
}
int main()
{
   //initalizing two points
   Point *p1 = (Point *)malloc(sizeof(Point));
   Point *p2 = (Point *)malloc(sizeof(Point));
  
  
   float x,y;
   //reading input and storing data
   printf("Point1 :\n x:");
   scanf("%f",&x);
   printf(" y:");
   scanf("%f",&y);
  
   set(p1,x,y);
  
   printf("Point2 :\n x:");
   scanf("%f",&x);
   printf(" y:");
   scanf("%f",&y);
  
   set(p2,x,y);
  
  
   //now finding distance
   printf("Distance :%f\n",distance(p1,p2));
  
   return 0;
}

output:

Point1 :
x:25
y:15
Point2 :
x:35
y:10
Distance :11.180340

Process exited normally.
Press any key to continue . . .