Drawing a line between 2 points in a console

[Mythios]

Looking at a function helios remade here ( http://www.cplusplus.com/forum/beginner/8702/ ) I quickly threw this together and was wondering if it's possible in a console program to just draw '.' making a line between these two points. I know this is a basic question but I'm not to sure how to.

Thanks

#include <stdio.h>
#include <cmath>

double cal_distance(double d_x1, double d_x2, double d_y1, double d_y2)
{
	return sqrt(pow(d_x2 - d_x1,2)+pow(d_y2 - d_y1,2));
}

struct Object
{
	double y, x;
};

void main()
{
	Object m_Object[2];

	m_Object[0].x = 20;
	m_Object[0].y = 5;

	m_Object[1].x = 75;
	m_Object[1].y = 17;

	char map[20][79];

	for(int i = 0; i < 20; ++i)
	{
		for(int j = 0; j < 79; ++j)
		{
			map[i][j] = ' ';
		}
	}

	map[(int)m_Object[0].y][(int)m_Object[0].x] = 'A';
	map[(int)m_Object[1].y][(int)m_Object[1].x] = 'B';

	for(int i = 0; i < 20; ++i)
	{
		for(int j = 0; j < 79; ++j)
		{
			printf("%c", map[i][j]);
		}
		printf("\n");
	}

	double distance = 0;

	distance = cal_distance( m_Object[0].x , m_Object[1].x , m_Object[0].y , m_Object[1].y );

	printf("Distance Between The Points = %f\n" , distance);
}

[Mythios]

Just got it working by using this:

int Sign(double x) {
    if (x < 0)
	{
		return -1;
	}
    else
	{
		return 1;
	}
}

void drawLine(double xPrev, double yPrev, double x, double y, char (&map)[20][79])
{
    double x1 = xPrev;
    double y1 = yPrev;
    double x2 = x;
    double y2 = y;
    double dy = y2 - y1;
    double dx = x2 - x1;
   
    if (fabs(dy) > fabs(dx)) 
	{
        for( y = y1; y != y2; y += Sign( dy ) ) 
		{
            x = x1 + ( y - y1 ) * dx / dy;
			map[(int)y][(int)x] = '.';

        }
    }
   
    else 
	{
        for( x = x1; x != x2; x += Sign( dx ) ) 
		{
            y = y1 + ( x - x1 ) * dy / dx;
			map[(int)y][(int)x] = '.';
        }
    }

    // draw the last point
	map[(int)y2][(int)x2] = '.';
}

Anyone know of any simpler ways or?