Graphics in C – Program to create a clock
In C computer language, you
can create any program. Only your imagination is the limit. Here is a program
in C graphics, which creates a clock. Please type this program in your editor.
#include<graphics.h>
#include<math.h>
#include<conio.h>
#include<dos.h>
#include<stdio.h>
#include<time.h>
#include<stdlib.h>
int i=0, j=0, k=0, l=0;
int s, m, h, c, r;
void dial(int x, int y);
void minutehand(int a, int b, int c);
void secondhand(int a, int b, int c);
void hourhand(int a, int b, int c);
void main()
{
int gd=DETECT, gm;
int maxx, maxy;
char str[50];
int ch1, ch2, ch3, ch4, ch5, ch6;
int
hour, min, sec;
/*
time_t is a variable type */
time_t t;
/* time() gets time of day */
time(&t);
/*
ctime() converts date and
time
to a string */
strcpy(str, ctime(&t));
initgraph(&gd, &gm,
"c:\\tc\\bgi");
/* for converting a charactor to
an integer */
ch1=str[11]-'0';
ch2=str[12]-'0';
ch3=str[14]-'0';
ch4=str[15]-'0';
ch5=str[17]-'0';
ch6=str[18]-'0';
hour=ch1*10+ch2;
min=ch3*10+ch4;
sec=ch5*10+ch6;
if(hour>=12)
{
hour=hour-12;
}
s=sec;
m=min;
h=hour;
c=m/12;
r=m%12;
maxx=getmaxx();
maxy=getmaxy();
while(!kbhit())
{
cleardevice();
dial(maxx, maxy);
hourhand(maxx, maxy,
hour);
minutehand(maxx, maxy,
min);
secondhand(maxx, maxy,
sec);
delay(1000);
if(s+i==60)
{
j++;
s=0;
}
if(i>60)
{
i=i%60;
}
l=j;
if(r+l==12)
{
r=0;
k++;
}
if(l>12)
{
l=l%12;
}
if(k==5)
{
k=0;
}
}
closegraph();
restorecrtmode();
}
void dial(int x, int y)
{
setcolor(WHITE);
setfillstyle(SOLID_FILL, WHITE);
circle(x/2, y/2, 120);
floodfill(x/2, y/2, WHITE);
circle(x/2, y/2, 140);
setfillstyle(SOLID_FILL, DARKGRAY);
floodfill(x/2, y/2-130, WHITE);
setcolor(RED);
settextstyle(0, 0, 2);
outtextxy(x/2-13, y/2-110, "12");
outtextxy(x/2-6, y/2+96, "6");
outtextxy(x/2-108, y/2-7, "9");
outtextxy(x/2+96, y/2-7, "3");
circle(x/2, y/2, 10);
setfillstyle(SOLID_FILL, RED);
floodfill(x/2, y/2, RED);
setcolor(BLACK);
circle(x/2, y/2-115, 4);
setfillstyle(SOLID_FILL, BLACK);
floodfill(x/2, y/2-115, BLACK);
circle(x/2, y/2+115, 4);
floodfill(x/2, y/2+115, BLACK);
circle(x/2-114, y/2, 4);
floodfill(x/2-114, y/2, BLACK);
circle(x/2+114, y/2, 4);
floodfill(x/2+114, y/2, BLACK);
circle(x/3+45, y/3-15, 4);
floodfill(x/3+45, y/3-15, BLACK);
circle(x/3+5, y/3+30, 4);
floodfill(x/3+5, y/3+30, BLACK);
circle(x/3+45, 2*y/3+15, 4);
floodfill(x/3+45, 2*y/3+15, BLACK);
circle(x/3+5, 2*y/3-30, 4);
floodfill(x/3+5, 2*y/3-30, BLACK);
circle(2*x/3-45, y/3-15, 4);
floodfill(2*x/3-45, y/3-15, BLACK);
circle(2*x/3-5, y/3+30, 4);
floodfill(2*x/3-5, y/3+30, BLACK);
circle(2*x/3-5, 2*y/3-30, 4);
floodfill(2*x/3-5, 2*y/3-30, BLACK);
circle(2*x/3-45, 2*y/3+15, 4);
floodfill(2*x/3-45, 2*y/3+15, BLACK);
}
void secondhand(int a, int b, int sec)
{
int
x1=a/2, y1=b/2;
int x2, y2;
/* 2*3.14/60=0.1047 */
x2=x1+(int)(90 * cos((i-15+sec)*0.1047));
y2=y1+(int)(90 * sin((i-15+sec)*0.1047));
setcolor(BLACK);
setlinestyle(0, 0, 1);
line(x1, y1, x2, y2);
i++;
}
void minutehand(int a, int b, int min)
{
int x1, x2, y1, y2;
x1=a/2;
y1=b/2;
setcolor(BLACK);
setlinestyle(0,
0, 3);
x2=x1+(int)(90*cos((min+j-15)*0.1047));
y2=y1+(int)(90*sin((min+j-15)*0.1047));
line(x1, y1, x2, y2);
}
void hourhand(int a, int b, int hour)
{
int x1, y1, x2, y2;
x1=a/2;
y1=b/2;
setcolor(BLACK);
setlinestyle(0, 0, 3);
x2=x1+(int)(70*cos(((hour*5)+k+c-15)*0.1047));
y2=y1+(int)(70*sin(((hour*5)+k+c-15)*0.1047));
line(x1, y1, x2, y2);
}
Compile and execute this
program. You will see a clock displaying hour, minute and second hands, and all
hands showing the current time. All hands will update every second as in the
real clock. This is a very simple program. I hope you will enjoy this program.
OUTPUT:
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OUTPUT:
You would also like these programs given below:
C Program to draw a line
C Program to draw a circle and a point
C Program to draw different types of ellipses
C Program to draw arc, pie-slice, and rectangle
C Program to draw a polygon
C Program to draw filled polygon, 2-D bar, and 3-D bar
C Program to create the user-defined fill-pattern
C Program to explain different line-styles
C Progarm to explain functions moveto() and lineto()
C Program to explain moverel() and linerel()
C Program to draw an elliptical pie-slice using sector()
C Program to write text in different font styles using settextstyle()
C Program to justify text using settextjustify()
C Program to explain function setusercharsize()
C Program to define palette of colors
C Program to generate captcha code
C Program for moving a ball on screen
C Program for creating animated circles
Playing with mouse using C language
C Program to restrict mouse pointer in a window
C Program for getting the position of mouse pointer
C Program to create a clock
