draw line between tow points

//
//  main.c
//  Drawing Lines Between Points
//
//  Created by dabbaghıe on 25.11.2019.
//  Copyright © 2019 dabbaghıe. All rights reserved.
//

#include <stdio.h>
#include <math.h>

int Abs(int x) {
    if (x < 0)
    return -x;
    else
    return x;
}

// function to get the sign (+1 or -1) of an integer
int Sign(int x) {
    if (x < 0)
    return -1;
    else
    return 1;
}
void drawLine(int xPrev, int yPrev, int x, int y)
{
    int x1 = xPrev;
    int y1 = yPrev;
    int x2 = x;
    int y2 = y;
    int dy = y2 - y1;
    int dx = x2 - x1;
    if (Abs(dy) > Abs(dx)) {
        
        // since there is a greater change in y than x we must
    
        // loop in y, calculate x and draw
        for (y=y1; y != y2; y += Sign(dy)) {
            x = x1 + (y - y1) * dx / dy;
        }
    }
    else {
        // since there is a greater (or equal) change in x than y we must

        // loop in x, calculate y and draw
        for (x=x1; x != x2; x += Sign(dx)) {
            y = y1 + (x - x1) * dy / dx;
        }
    }
}

void gotoxy(int x,int y)
{
    printf("%c[%d;%df", 0x1b, y, x);
}

int main ()

{
    
    int i,j,k,r=5,x=5,y=6,d,a,l;
    
    for(i=0;i<24;i++)
        
    {
        
        for(j=0;j<25;j++)
            
        {
            
            a=((i-x)*(i-x))+((j-y)*(j-y));
            
            d=sqrt(a);
            
            if(r==d)
                
            {
                
                printf("*");
                
            }
            
            else
                
                printf(" ");
            
        }
        
        printf("\n");
        
    }
    
    return 0;
    
}