Pass structure as pointer to a function - C Structure

C examples for Structure:Structure Value

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Description

Pass structure as pointer to a function

Demo Code

#include <stdio.h>

#define DELAY 128000/*from  www .ja  v a2 s .c o m*/

struct my_time {
   int hours;
   int minutes;
   int seconds;
};

void display(struct my_time *t);
void update(struct my_time *t);
void delay(void);

int main(void)
{
   struct my_time systime;

   systime.hours = 0;
   systime.minutes = 0;
   systime.seconds = 0;

   for (;;) {
      update(&systime);
      display(&systime);
   }

   return 0;
}

void update(struct my_time *t)
{
   t->seconds++;
   if (t->seconds == 60) {
      t->seconds = 0;
      t->minutes++;
   }

   if (t->minutes == 60) {
      t->minutes = 0;
      t->hours++;
   }

   if (t->hours == 24) t->hours = 0;
   delay();
}

void display(struct my_time *t)
{

   printf("%02d:", t->hours);
   printf("%02d:", t->minutes);
   printf("%02d\n", t->seconds);
}

void delay(void)
{
   long int t;

   /* change this as needed */
   for (t = 1; t<DELAY; ++t);
}

Result


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