Create DigitalClock.c

C/DigitalClock.c

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+/*C program to design a digital clock.*/
+
+#include <stdio.h>
+#include <time.h> //for sleep() function
+#include <unistd.h>
+#include <stdlib.h>
+
+int main()
+{
+    int hour, minute, second;
+
+    hour=minute=second=0;
+
+    while(1)
+    {
+        //clear output screen
+        system("clear");
+
+        //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;
+}