Analogclock.c

 
#include<stdio.h>
#include<graphics.h>
#include<stdlib.h>
#include<math.h>
#include<dos.h>
#include<time.h>
 
#define PI 3.147
 
void clockLayout();
void secHand();
void hrHand();
void minHand();
int maxx,maxy;
 
void main()
{
 int gdriver=DETECT,gmode,error;
 initgraph(&gdriver,&gmode,"c:\turboc3\bgi\");
 error=graphresult();
 if(error!=grOk)
 {
  printf("Error in graphics, code= %d",grapherrormsg(error));
  exit(0);
 }
 
 while(1)
 {
  clockLayout();
  secHand();
  minHand();
  hrHand();
  sleep(1);                /* pausing the outputscreen for 1 sec */
  cleardevice();           /* clearing the previous picture of clock */
 }
}
 
void clockLayout()
{
 int i,x,y,r;
 float j;
 maxx=getmaxx();
 maxy=getmaxy();
 
 for(i=1;i<5;i++)
 {                   /* printing a round ring with outer radius of 5 pixel */
  setcolor(YELLOW);
  circle(maxx/2,maxy/2,120-i);
 }
 
 pieslice(maxx/2,maxy/2,0,360,5);    /* displaying a circle in the middle of clock */
 x=maxx/2+100;y=maxy/2;
 r=100;
 setcolor(BLUE);
 
 for(j=PI/6;j<=(2*PI);j+=(PI/6))
 {    /* marking the hours for every 30 degrees */
  pieslice(x,y,0,360,4);
  x=(maxx/2)+r*cos(j);
  y=(maxy/2)+r*sin(j);
 }
 
 x=maxx/2+100;y=maxy/2;
 r=100;
 setcolor(RED);
 
 for(j=PI/30;j<=(2*PI);j+=(PI/30))
 {  /* marking the minutes for every 6 degrees */
  pieslice(x,y,0,360,2);
  x=(maxx/2)+r*cos(j);
  y=(maxy/2)+r*sin(j);
 }
}
 
void secHand()
{
 struct time t;
 int r=80,x=maxx/2,y=maxy/2,sec;
 float O;
 
 maxx=getmaxx();maxy=getmaxy();
 gettime(&t);                     /*getting the seconds in system clock */
 sec=t.ti_sec;
 O=sec*(PI/30)-(PI/2);           /* determining the angle of the line with respect to vertical */
 setcolor(YELLOW);
 line(maxx/2,maxy/2,x+r*cos(O),y+r*sin(O));
}
 
void hrHand()
{
 int r=50,hr,min;
 int x,y;
 struct time t;
 float O;
 
 maxx=getmaxx();
 maxy=getmaxy();
 x=maxx/2,y=maxy/2;
 gettime(&t);                     /*getting the seconds in system clock */
 hr=t.ti_hour;
 min=t.ti_min;
 
 /* determining the angle of the line with respect to vertical */
 if(hr<=12)O=(hr*(PI/6)-(PI/2))+((min/12)*(PI/30));
 if(hr>12) O=((hr-12)*(PI/6)-(PI/2))+((min/12)*(PI/30));
 setcolor(BLUE);
 line(maxx/2,maxy/2,x+r*cos(O),y+r*sin(O));
}
 
void minHand()
{
 int r=60,min;
 int x,y;
 float O;
 struct time t;
 maxx=getmaxx();
 maxy=getmaxy();
 x=maxx/2;
 y=maxy/2;
 gettime(&t);  /*getting the seconds in system clock */
 min=t.ti_min;
 O=(min*(PI/30)-(PI/2)); /* determining the angle of the line with respect to vertical */
 setcolor(RED);
 line(maxx/2,maxy/2,x+r*cos(O),y+r*sin(O));
 }