Analog Clock Program in C
Here is simple C program for analog clock. This can be used as a reference for project reference.
/*Note press ctrl+pause break to stop the clock while executing in TC*/
#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));
}
