#include <graphics.h> /* For graphics library functions */
#include <stdlib.h> /* For exit() */
#include <stdio.h>
#include <conio.h>
int set_graph(void); /* Initialize graphics */
void calc_coords(void); /* Scale distances onscreen */
void draw_planets(void); /* Draw and fill planet circles */
/* Draw one planet circle */
void draw_planet(float x_pos, float radius,
int
color, int fill_style);
void get_key(void);
/* Display text on graphics screen, */
/* wait for key */
/* Global variables -- set by calc_coords() */
int max_x, max_y;
/* Maximum x- and y-coordinates */
int y_org;
/* Y-coordinate for all drawings */
int au1;
/* One astronomical unit in pixels
(inner planets)
*/
int au2;
/* One astronomical unit in pixels
(outer planets)
*/
int erad;
/* One earth radius in pixels */
int main()
{
/* Exit if not EGA
or VGA */
/* Find out if they
have what it takes */
if (set_graph() !=
1) {
printf("This program requires EGA or VGA graphics\n");
exit(0);
}
calc_coords(); /* Scale to graphics resolution in use
*/
draw_planets(); /* Sun
through Uranus (no room for others) */
get_key(); /* Display message and wait for key
press */
closegraph(); /* Close graphics system */
return 0;
}
int set_graph(void)
{
int graphdriver =
DETECT, graphmode, error_code;
/* Initialize
graphics system; must be EGA or VGA */
initgraph(&graphdriver, &graphmode, "..\\bgi");
error_code =
graphresult();
if (error_code !=
grOk)
return(-1); /* No graphics hardware found */
if ((graphdriver !=
EGA) && (graphdriver != VGA))
{
closegraph();
return 0;
}
return(1); /* Graphics OK, so return
"true" */
}
void calc_coords(void)
{
/* Set global
variables for drawing */
max_x =
getmaxx(); /* Returns maximum
x-coordinate */
max_y =
getmaxy(); /* Returns maximum
y-coordinate */
y_org = max_y /
2; /* Set Y coord for all
objects */
erad = max_x / 200;
/* One earth radius in pixels */
au1 = erad *
20; /* Scale for inner
planets */
au2 = erad *
10; /* scale for outer
planets */
}
void draw_planets()
{
/* Each call
specifies x-coordinate in au, radius, and color */
/* arc of Sun */
draw_planet(-90,
100, EGA_YELLOW, EMPTY_FILL);
/* Mercury */
draw_planet(0.4 *
au1, 0.4 * erad, EGA_BROWN, LTBKSLASH_FILL);
/* Venus */
draw_planet(0.7 *
au1, 1.0 * erad, EGA_WHITE, SOLID_FILL);
/* Earth */
draw_planet(1.0 *
au1, 1.0 * erad, EGA_LIGHTBLUE, SOLID_FILL);
/* Mars */
draw_planet(1.5 *
au1, 0.4 * erad, EGA_LIGHTRED, CLOSE_DOT_FILL);
/* Jupiter */
draw_planet(5.2 *
au2, 11.2 * erad, EGA_WHITE, LINE_FILL);
/* Saturn */
draw_planet(9.5 *
au2, 9.4 * erad, EGA_LIGHTGREEN, LINE_FILL);
/* Uranus */
draw_planet(19.2 *
au2, 4.2 * erad, EGA_GREEN, LINE_FILL);
}
void draw_planet(float x_pos, float radius, int color, int
fill_style)
{
setcolor
(color); /* This becomes
drawing color */
circle(x_pos,
y_org, radius); /* Draw the circle */
setfillstyle(fill_style, color); /* Set pattern to fill interior */
floodfill(x_pos,
y_org, color); /* Fill the circle */
}
void get_key(void)
{
outtextxy(50, max_y
- 20, "Press any key to exit");
getch();
}
Contact:
Mr. Roshan P. Helonde
Mobile: +91-7276355704
WhatsApp: +91-7276355704
Email: roshanphelonde@rediffmail.com
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