How to read in time format?

Can someone help me? thanks.... I tried reading the things written on net, but than i realised that i dont know or never seen ALOT of the commands written there. I'm learning very very basic c programming till this point of time. thanks for your help.

I'm supposed to read in the time given by the user.
There are 2 ways of doing it.
1) using the 12hour clock
2) using the 24 hour clock

To read in the 12 hour clock i use this
printf ("Please enter time of entry: ");
fflush (stdin);
scanf ("%f%s",&two->oneone.entry_times,&two->oneone.time);

but when i use this to read in the 24 hour clock, it always waits till i key in a alphabet. How so i just read in the numbers?

if i just use ("%f",&two->oneone.entery_times)
than i cant enter the "am" and "pm" part.

what to do?

Is there anyway to do stimulation of a car moving using very basic c programming commands? (this one is just curious, want to know only)

thanks for all you help...

> fflush (stdin);
http://faq.cprogramming.com/cgi-bin/...&id=1043284351

> I'm supposed to read in the time given by the user.
Basically, you read all input as a string, then parse that string to see what the user typed.

Code:

#include <stdio.h>
int main ( ) {
  char buff[100];
  if ( fgets( buff, sizeof buff, stdin ) != NULL ) {
    int now;
    char ampm[3];
    if ( sscanf( buff, "%d%2s", &now, ampm ) == 2 ) {
      printf( "12 hr time = %d %s\n", now, ampm );
    } else if ( sscanf( buff, "%d", &now ) == 1 ) {
      printf( "24 hr time = %04d\n", now );
    } else {
      printf( "Huh?\n" );
    }
  }
  return 0;
}