clock.cpp
This program will run in Borland Turbo C++ 3.0 (it uses BGI) along with the files:
ginit.cpp and gutility.cpp
//************************************************
//*clock.cpp *
//*C/Turbo C++ 3.0 *
//*Program is a animation of a analog clock, *
//*whose hands reflect the current system time. *
//* *
//************************************************
#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <ctype.h>
#include <string.h>
#include <dos.h>
#include <math.h>
#include <graphics.h>
#include <time.h>
//references files on floppy disk (a:)
#include "a:gutility.cpp" //Graphics utilities
#include "a:ginit.cpp" //Graphic initializers
//Function Prototypes
long double roundld(long double); //function rounds long doubles
double xfigure(double,double,double,int,int);
//^^function figures handlength and ending x
double yfigure(double,double,double,int,int, double);
//^^function figures handlength and ending y
main()
{
opengraph();
int hr,sec,min;
struct time t,t2;
int xcenter,ycenter; //variable declarations
int startx,starty;
double lstartx,lstarty;
int xdist,ydist,endx,endy,ticklength;
int numdist,numx,numy,i;
double handlength,handvalue;
double radians;
char numstring[3];
int aspectx,aspecty;
double xyratio;
//numbers in the array the way they will be drawn
int cnumber[]={3,9,9,3,2,10,8,4,1,11,7,5,12,12,6,6};
int page=0; //page set to zero
//CONTINUES TO DRAW THE CLOCK ON THE OTHER PAGE
while (!kbhit())
{
setvisualpage(page);
setactivepage(1-page);
cleardevice(); //clears the screen
int cnum=0;
int radius = getmaxx()/4;
lstartx=lstarty=0; //set variables to zero
xdist=ydist=endy=endx=ticklength=0;
numdist=numx=numy=i=0;
radians=startx=starty=0;
handvalue=handlength=0;
aspectx=aspecty=0;
xyratio=0;
setlinestyle(SOLID_LINE,SOLID_FILL,THICK_WIDTH);
setcolor(WHITE); //makes sure color is white
circle(xcenter,ycenter,radius); //draws circle
gettime(&t);
hr = t.ti_hour; //gets time elements
min = t.ti_min;
sec = t.ti_sec;
if (hr>12)
hr -=12;
getaspectratio(&aspectx, &aspecty);
xyratio = double (aspectx)/(aspecty);
//TICK DRAWING AND NUMBER LOOP
for (int count=0; count<=90; count+=6)//tick at every 6 degrees
{
radians=(count/180.00)*3.141593; //converting degrees to radians
lstartx= cos(radians)*radius + xcenter;//figures x on circle
lstarty=( ycenter - (sin(radians)*radius) *xyratio);//figures y on circle
startx=((int)roundld(lstartx));//round CALLS ROUNDLD FUNCTION
starty=((int)roundld(lstarty));//round CALLS ROUNDLD FUNCTION
//FIGURES WHETHER A BIG TICK & A NUMBER OR A SMALL TICK
if (count ==0 || count ==30 || count==60 || count==90)//if big tick
{setlinestyle(SOLID_LINE,SOLID_FILL,THICK_WIDTH);
ticklength=100/10; //10%
numdist=100/20; //20% for clock numbers
numx=startx-(startx-xcenter)/numdist;
numy=starty+(ycenter-starty)/numdist;
settextjustify(CENTER_TEXT,CENTER_TEXT);
settextstyle(DEFAULT_FONT,HORIZ_DIR,2);//magnif. factor=2
cnum=cnumber[i];
itoa(cnum,numstring,10);//converts integer toa string
outtextxy(numx,numy,numstring);//draws number in Q1
numx=xcenter-(numx-xcenter); //new numx
cnum=cnumber[i+=1];
itoa(cnum,numstring,10);//converts integer toa string
outtextxy(numx,numy,numstring);//draws number in Q2
numy=ycenter+(ycenter-numy); //new numy
cnum=cnumber[i+=1];
itoa(cnum,numstring,10);//converts integer toa string
outtextxy(numx,numy,numstring);//draws number in Q3
numx=xcenter+(xcenter-numx); //new (old)numx
cnum=cnumber[i+=1];
itoa(cnum,numstring,10);//converts integer toa string
outtextxy(numx,numy,numstring);//draws number in Q4
i+=1;//increments array for Q1
}
else
{setlinestyle(SOLID_LINE,SOLID_FILL,NORM_WIDTH);
ticklength =100/5; //5%
}//END LOOP
xcenter = getmaxx()/2;
ycenter = getmaxy()/2;
//DRAWING TICKS
endx=startx-(startx-xcenter)/ticklength;
endy=starty+(ycenter-starty)/ticklength;
line (startx,starty,endx,endy); //draws in Quadrant1
xdist=startx-xcenter; //gets distance from center
startx=xcenter-xdist; //new startx
endx=xcenter-(endx-xcenter); //new endx
line (startx,starty,endx,endy); //draws in Quadrant2
ydist=ycenter-starty; //gets distance from center
starty=ycenter+ydist; //new starty
endy=ycenter+(ycenter-endy); //new endy
line (startx,starty,endx,endy); //draws in Quadrant3
startx=xcenter+xdist; //new (old)startx
endx=xcenter+(xcenter-endx); //new (old)starty
line (startx,starty,endx,endy); //draws in Quadrant4
}//END OF TICK DRAWING AND NUMBER LOOP
//DRAWING HANDS
handlength = 100/75.00;//75% SECONDS
handvalue = (sec*6)-90;
radians=(handvalue/180.00)*3.141593; //converting degrees to radians
endx = ((int) xfigure(radians,handvalue,handlength,xcenter,radius) );
endy = ((int) yfigure(radians,handvalue,handlength,ycenter,radius,xyratio) );
setlinestyle(SOLID_LINE,SOLID_FILL,NORM_WIDTH);
setcolor(LIGHTRED);
line (xcenter,ycenter,endx,endy);
handlength = 100/60.00;//60% MINUTES
handvalue = (min*6)-90;
radians=(handvalue/180.00)*3.141593; //converting degrees to radians
endx = ((int) xfigure(radians,handvalue,handlength,xcenter,radius) );
endy = ((int) yfigure(radians,handvalue,handlength,ycenter,radius,xyratio) );
setlinestyle(SOLID_LINE,SOLID_FILL,THICK_WIDTH);
setcolor(MAGENTA);
line (xcenter,ycenter,endx,endy);
handlength = 100/45.00;//45% HOURS
handvalue = (hr*30)+(min*.5)-90;//90 degrees plus hr*every 30 degrees
//^so hourhand moves constantly
radians=(handvalue/180.00)*3.141593; //converting degrees to radians
endx = ((int) xfigure(radians,handvalue,handlength,xcenter,radius) );
endy = ((int) yfigure(radians,handvalue,handlength,ycenter,radius,xyratio) );
//linestyle the same
setcolor(CYAN);
line (xcenter,ycenter,endx,endy);
if (page==1) //CHANGES THE PAGE
page=0;
else
page=1;
}//END OF WHILE WITH THE KBHIT
closegraph();
return 0;
}
long double roundld( long double number)
{//THIS ROUNDS THE NUMBER
long double testnum=0;
int testnumi=0,nint=0;
//testnum used to figure whether to round up or not
testnum = ( (number*10) );
testnumi=testnum;
if ( (testnumi%10) >= 5 )
nint = ceil(number); //rounds up
else
nint = floor(number); //rounds down
return nint;
}
double xfigure(double rad, double value, double length, int center, int r)
{ double end =0;
int iend=0;
end = ( (r*cos(rad))/length )+center;
iend=( (int)roundld(end) );//calls function roundld
return iend;
}
double yfigure(double rad, double value, double length, int center, int r, double aspect)
{ double end =0;
int iend=0;
//USING ASPECTRATIO
if (value >= -90 || value <=90)//value in Quadrant2 or 1 (y is pos)
{
end = ( ((r*sin(rad)) )/length )*aspect+center;
}
else
{
end = ( ( (-1)* (r*sin(rad)) )/length )*aspect+center;
}
iend=( (int)roundld(end) );//calls function roundld
return iend;
}
