#include <stdio.h>
#include <conio.h>
#include <graphics.h>
#include <dos.h>
#include <math.h>
/* manipulates the position of planets on the orbit */
void planetMotion(int xrad, int yrad, int midx, int midy, int x[60], int y[60]) {
int i, j = 0;
/* positions of planets in their corresponding orbits */
for (i = 360; i > 0; i = i - 6) {
x[j] = midx - (xrad * cos((i * 3.14) / 180));
y[j++] = midy - (yrad * sin((i * 3.14) / 180));
}
return;
}
int main() {
/* request auto detection */
int gdriver = DETECT, gmode, err;
int i = 0, midx, midy;
int xrad[9], yrad[9], x[9][60], y[9][60];
int pos[9], planet[9], tmp;
/* initialize graphic mode */
initgraph(&gdriver, &gmode, "C://TC//BGI");
err = graphresult();
if (err != grOk) {
/* error occurred */
printf("Graphics Error: %s",
grapherrormsg(err));
return 0;
}
/* mid positions at x and y-axis */
midx = getmaxx() / 2;
midy = getmaxy() / 2;
/* manipulating radius of all 9 planets */
planet[0] = 7;
for (i = 1; i < 9; i++) {
planet[i] = planet[i - 1] + 1;
}
/* offset position for the planets on their corresponding orbit */
for (i = 0; i < 9; i++) {
pos[i] = i * 6;
}
/* orbits for all 9 planets */
xrad[0] = 60, yrad[0] = 30;
for (i = 1; i < 9; i++) {
xrad[i] = xrad[i - 1] + 30;
yrad[i] = yrad[i - 1] + 15;
}
/* positions of planets on their corresponding orbits */
for (i = 0; i < 9; i++) {
planetMotion(xrad[i], yrad[i], midx, midy, x[i], y[i]);
}
while (!kbhit()) {
/* drawing 9 orbits */
setcolor(WHITE);
for (i = 0; i < 9; i++) {
ellipse(midx, midy, 0, 360, xrad[i], yrad[i]);
}
/* sun at the mid of the solar system */
setcolor(YELLOW);
setfillstyle(SOLID_FILL, YELLOW);
circle(midx, midy, 20);
floodfill(midx, midy, YELLOW);
/* mercury in first orbit */
setcolor(CYAN);
setfillstyle(SOLID_FILL, CYAN);
pieslice(x[0][pos[0]], y[0][pos[0]], 0, 360, planet[0]);
/* venus in second orbit */
setcolor(GREEN);
setfillstyle(SOLID_FILL, GREEN);
pieslice(x[1][pos[1]], y[1][pos[1]], 0, 360, planet[1]);
/* earth in third orbit */
setcolor(BLUE);
setfillstyle(SOLID_FILL, BLUE);
pieslice(x[2][pos[2]], y[2][pos[2]], 0, 360, planet[2]);
/* mars in fourth orbit */
setcolor(RED);
setfillstyle(SOLID_FILL, RED);
pieslice(x[3][pos[3]], y[3][pos[3]], 0, 360, planet[3]);
/* jupiter in fifth orbit */
setcolor(BROWN);
setfillstyle(SOLID_FILL, BROWN);
pieslice(x[4][pos[4]], y[4][pos[4]], 0, 360, planet[4]);
/* saturn in sixth orbit */
setcolor(LIGHTGRAY);
setfillstyle(SOLID_FILL, LIGHTGRAY);
pieslice(x[5][pos[5]], y[5][pos[5]], 0, 360, planet[5]);
/* uranus in sevth orbit */
setcolor(BROWN);
setfillstyle(SOLID_FILL, BROWN);
pieslice(x[6][pos[6]], y[6][pos[6]], 0, 360, planet[6]);
/* neptune in eigth orbit */
setcolor(LIGHTBLUE);
setfillstyle(SOLID_FILL, LIGHTBLUE);
pieslice(x[7][pos[7]], y[7][pos[7]], 0, 360, planet[7]);
/* pluto in ninth orbit */
setcolor(LIGHTRED);
setfillstyle(SOLID_FILL, LIGHTRED);
pieslice(x[8][pos[8]], y[8][pos[8]], 0, 360, planet[8]);
/* checking for one complete rotation */
for (i = 0; i < 9; i++) {
if (pos[i] <= 0) {
pos[i] = 59;
} else {
pos[i] = pos[i] - 1;
}
}
/* sleep for 2000 milliseconds */
delay(2000);
/* clears graphic screen */
cleardevice();
}
/* deallocate memory allocated for graphic screen */
closegraph();
return 0;
}
