C Program to design a digital clock

C Program to design a digital clock

Digital Clock With current time & Date

#include <stdio.h>
#include <time.h>//for sleep() function
#include <unistd.h>
#include<conio.h>
#include <stdlib.h>
int main()
{
int hour, minute, second;
hour=minute=second=0;
while(1)
{
//clear output screen
clrscr();
//print time in HH : MM : SS format
printf("%02d : %02d : %02d ",hour,minute,second);
//clear output buffer in gcc
fflush(stdout);
//increase second
second++;
//update hour, minute and second
if(second==60){
minute+=1;
second=0;
}
if(minute==60){
hour+=1;
minute=0;
}
if(hour==24){
hour=0;
minute=0;
second=0;
}
sleep(1);   //wait till 1 second
}
return 0; 

}

output:-

00 : 01 : 17  

Digital Clock With current time & Date

#include<stdio.h>               // Use Input Output 
#include<conio.h>               // Use Hold Screen 
#include<time.h>                // use For Time 
#include<graphics.h>            // use for graphics 

void main ()
{
int graphdriver=DETECT, graphmode,i;    // variable
time_t rawTime;                         // variable
char a[100];                            // string variable
struct tm * currentTime;            // Structure pointer variable


initgraph(&graphdriver,&graphmode,"c:\\tc\\bgi");  

while(1)                    // infinite loop
{

// design rectangle for display 

rectangle(1,1,639,444);
rectangle(2,2,638,110);
rectangle(2,111,638,222);
rectangle(2,222,638,333);
rectangle(2,333,638,444);
rectangle(450,0,638,110);

settextstyle(1,0,7);                // text style
outtextxy(15,10,"Watch Time");      // display text

settextstyle(1,0,7);                      // text style
outtextxy(15,350,"Welcome To Friends");   // Display text

rawTime = time(NULL);                     // set null time
currentTime = localtime(&rawTime);       // set pc local time

// print time I FOR HOUR & M FOR MINTUNE & S FOR SECOND

strftime(a,100,"%I:%M:%S",currentTime);   

setcolor(5);                       // set time color
settextstyle(1,0,10);              // set text style
outtextxy(40,80,a);                 // display time


// print Am And Pm 
setcolor(15);
settextstyle(3,0,12);
strftime(a,100,"%p",currentTime);   //  P for Am & Pm
outtextxy(470,-29,a);          // print AM & Pm


// print date
setcolor(15);
settextxy(1,0,7);

strftime(a,100,"Date :- %d\\%m\\%y",currentTIme);  // d for date & m for month & y for year 

outtextxy(40,230,a);     // print date

delay(1000);            // delay means wait 1000 ms
cleardevice();               // use clear data 
}

getch();                         // Use for hold Screen
closegraph();                     // graph close
}

Digital clock in c program

#include <stdio.h>
#include<conio.h>
#include <time.h>

void delay(int time)

{

long pause;

clock_t time1 , time2 ;

pause = time ;

time2 = time1 = clock();

while( (time1-time2) < pause )

{

time1 = clock();

}

}

void main()

{

int a,b,c ;

for( a=1 ; a<=60 ; a++ )

{

for( b=1 ; b<=60 ; b++ )

{

for(c =1 ; c<=60 ; c++ )

{

printf("%d : %d : %d ", a , b ,c );

delay(1000);

clrscr();

}

}

}

}

output:-

1 : 2 : 38