Question

Create a header file timer.h containing the following functions (you can have more functions, but the below ones are required. Do not modify the given function signatures.

// Initialize the timer with the user-provided input
void initTimer(ClockType *clock, int minutes, int seconds);

// Run the timer -- print out the time each second
void runTimer();

// Clean up memory (as needed)
void cleanTimer(ClockType  *clock);

Create a file timer.c and implement (at least) these three functions and any other functions you find helpful. Also, create testTimer.c with your main function implementation for this task.

Answer 1

/*
* timer.h file
*/

#ifndef CLOCK_TYPE_H
define CLOCK_TYPE_H
#include <stdio.h>
#include <unistd.h>

typedef struct ClockType
{
    int hr;
    int min;
    int sec;
}   ClockType;



void initTimer(ClockType *c, int minutes, int seconds);

void runTimer(ClockType *c);

void cleanTimer(ClockType *c);

#endif

/* timer.h file ends here */


/*
 * timer.c fle
 */

#include "timer.h"

// function to set timer

void initTimer(ClockType *c, int minutes, int seconds)
{
   c->hr = 0;
   c->min = minutes;
   c->sec = seconds;
}

// function to display current timer with every second
void runTimer(ClockType *c)
{
   int minToStop = 60; // put here in seconds
   
   int i;
   
   for(i = 0; i < minToStop; i++)
   {
      usleep(1000000);
      printf("Time (HH:MM:SS) - %d:%d:%d ",c->hr, c->min, c->sec);
      
      c->sec = c->sec + 1;
      
      if(c->sec == 60)
      {
         c->sec = 0;    
         c->min = c->min + 1;
      }
   }
}

// function to reset the timer
void cleanTimer(ClockType *c)
{
   c->hr = 0;
   c->min = 0;    
   c->sec = 0;
}

/* timer.c files ends here    */


/*
 * testTimer.c File
 */

#include <stdio.h>
#include "timer.h"

int main()
{
   ClockType c;
   initTimer(&c, 15, 30);
   runTimer(&c);
   cleanTimer(&c);    
   return 0;
}

/* testTimer.c ends here */

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