Question

1. Write C code to create a structure called time_of_day, which stores the current time in hours, minutes, and seconds. All the fields should be integers except for seconds, which should be a floating point value.
2. Write a C function called check_time, which takes a pointer to a time_of_day structure as input, and return 1 if the time is valid (0 to 23 hours, 0 to 59 minutes, 0 to 59.999999 seconds) and 0 otherwise. Assume that times are stored in 24 hour format, with 00:00:00 being midnight and 23:59:59.9999 being the last millisecond of the day.
3. Write a main program which reads a time from the user in the normal hh:mm:ss.sss format and stores it in a time_of_day structure. Your program should then call the check_time function to determine if it is a valid time or not, and display "valid time" or "invalid time" to the screen.

Answer 1

#include<stdio.h>
#include<conio.h>
struct time_of_day
{
   int Hour;
   int Minute;
   float Second;
};
int check_time( time_of_day *t1)
{ int Flag=1;
if (t1->Hour<0 || t1->Hour>23)
   {
   Flag=0;
   }
else if (t1->Minute<0 || t1->Minute>59)
   {
   Flag=0;
   }
else if (t1->Second<0 || t1->Second>59.999999)
   {
   Flag=0;
   }
return Flag;
}

void main()
{
   struct time_of_day T;
   clrscr();
   printf("\nEnter the Hour :");
   scanf("%d",&T.Hour);
   printf("\nEnter the Minute:");
   scanf("%d",&T.Minute);
   printf("\nEnter the Second:");
   scanf("%f",&T.Second);
   int R=check_time(&T);
   if(R==1)
   printf("VALID TIME");
   else
   printf("INVALID TIME");
   getch();
}