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Full Discussion: Calling an array of arrays in C.
Top Forums Programming Calling an array of arrays in C. Post 303023142 by Corona688 on Wednesday 12th of September 2018 11:44:27 AM
Old 09-12-2018
Here's how I had to use it:

Code:
#include <stdio.h>

void arrbyptr(int (*ptr[2][2])[2]) {

        printf("[0][0][0]=%d,[0][0][1]=%d,[0][1][0]=%d,[0][1][1]=%d\n",
                (*ptr)[0][0][0],
                (*ptr)[0][0][1],
                (*ptr)[0][1][0],
                (*ptr)[0][1][1]);

        printf("[1][0][0]=%d,[1][0][1]=%d,[1][1][0]=%d,[1][1][1]=%d\n",
                (*ptr)[1][0][0],
                (*ptr)[1][0][1],
                (*ptr)[1][1][0],
                (*ptr)[1][1][1]);


}

int main(void)
{
        int arr2d[2][2]={ {1,2},{3,4} };
        int arr2db[2][2]={ {5,6},{7,8} };

        int (*ptr[2][2])[2]= { arr2d, arr2db };

        arrbyptr(ptr);
}

There's an extra layer of indirection for the pointer pointers, but it wasn't quite where I expected it to be.
This User Gave Thanks to Corona688 For This Post:
Azrael
 

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LEARN ABOUT NETBSD

atomic_inc_32_nv

ATOMIC_INC(3)						   BSD Library Functions Manual 					     ATOMIC_INC(3)

NAME

     atomic_inc, atomic_inc_32, atomic_inc_uint, atomic_inc_ulong, atomic_inc_ptr, atomic_inc_64, atomic_inc_32_nv, atomic_inc_uint_nv,
     atomic_inc_ulong_nv, atomic_inc_ptr_nv, atomic_inc_64_nv -- atomic increment operations

SYNOPSIS

     #include <sys/atomic.h>

     void
     atomic_inc_32(volatile uint32_t *ptr);

     void
     atomic_inc_uint(volatile unsigned int *ptr);

     void
     atomic_inc_ulong(volatile unsigned long *ptr);

     void
     atomic_inc_ptr(volatile void *ptr);

     void
     atomic_inc_64(volatile uint64_t *ptr);

     uint32_t
     atomic_inc_32_nv(volatile uint32_t *ptr);

     unsigned int
     atomic_inc_uint_nv(volatile unsigned int *ptr);

     unsigned long
     atomic_inc_ulong_nv(volatile unsigned long *ptr);

     void *
     atomic_inc_ptr_nv(volatile void *ptr);

     uint64_t
     atomic_inc_64_nv(volatile uint64_t *ptr);

DESCRIPTION

     The atomic_inc family of functions increment (by one) the variable referenced by ptr in an atomic fashion.

     The *_nv() variants of these functions return the new value.

     The 64-bit variants of these functions are available only on platforms that can support atomic 64-bit memory access.  Applications can check
     for the availability of 64-bit atomic memory operations by testing if the pre-processor macro __HAVE_ATOMIC64_OPS is defined.

SEE ALSO

     atomic_ops(3)

HISTORY

     The atomic_inc functions first appeared in NetBSD 5.0.

BSD
								  April 11, 2007							       BSD
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