About Structures and Nested Arrays

[ahsonmonis]

struct event schedule[] = {{{9,45},{9,55}},{{13,0},{14,20}},{{15,0},{16,30}}};

So how can I read each individual entry?

I want to use this and compare it to an integer.

So basically lets say i have h = 9,

I want to see if h>9 or h<9 and h>13 or h<14 and h>15 or h<16
but i cant access the numbers in the schedule array because it is an array of arrays.

How can I see what the first element is, the second element etc.

[OneOffDriveByPoster]

First, some formatting:

c:

struct event schedule[] = {    {{ 9, 45}, { 9, 55}},    {{13,  0}, {14, 20}},    {{15,  0}, {16, 30}} };

Then, it may help if you provided a declaration of struct event.

c:

struct event {    int a[2], b[2]; };

Then, you can try something like:

c:

schedule[0].a[0]

[ahsonmonis]

I tried it but gave errors.

code:

struct event schedule[] = {{{9,45},{9,55}},{{13,0},{14,20}},{{15,0},{16,30}}};

Ok purpose: Print the first entry and then print the second last entry.
So output be like 9, 16

How can I do that.

code:

// File name is arrayHelp.c #include <stdio.h> #include "arrayHelp.h" int main (void) {   struct event schedule[] = {{{9,45},{9,55}},{{13,0},{14,20}},{{15,0},{16,30}}};   struct event {    int a[2], b[2], c[2];    };  printf ("%d\n",schedule[0].a[0]);  printf ("%d\n",schedule[1]);  printf ("%d\n",schedule[2]);    system ("pause");  return 0; }

code:

// Filename is arrayHelp.h   struct tod {     int hour, minute;   };   struct event {     struct tod start, end;   };     int freetime (struct event schedule[], int n, int hour, int min);

It is still giving me an error. I attached the programs as well.

[ahsonmonis]

oh also, how do u add code tags so it is properly formatted and colored.

[OneOffDriveByPoster]

ahsonmonis @ Thu Oct 22, 2009 6:44 pm wrote:

oh also, how do u add code tags so it is properly formatted and colored.

You can see how by clicking on the "quote" button on the top-right corner of a post that has that. It will only get you the colour though. Space it yourself, or dump it in something that will auto-format first.

Anyhow, when I said to provide a declaration, I meant to the forum. The code I gave was only an example. You do have a declaration in your code already. To access a struct member correctly, it is necessary to know how the struct type was declared.

Your relevant declarations are:

c:

struct tod {    int hour, minute; }; struct event {    struct tod start, end; };

So you can refer to the `9' like so:

c:

schedule[0].start.hour

[AtoZ]

Thanks alot. That is exactly what I was looking for.