Warning 167(-D) on const type * versus type *

Besides this has nothing to do with the original problem..... this is ALSO an unjust warning !!

Look at the code !: v1 IS an array, and the parameter IS a POINTER to array !!! so &v1 is a 100% correct syntax.

And as the warning itself states: "Of the two only &a may be assigned to p without complaint" so why is it complaining ?

Besides this has nothing to do with the original problem..... this is ALSO an unjust warning !!

Look at the code !: v1 IS an array, and the parameter IS a POINTER to array !!! so &v1 is a 100% correct syntax.

And as the warning itself states: "Of the two only &a may be assigned to p without complaint" so why is it complaining ?

this is ALSO an unjust warning !!

Hmmm. You might get some disagreement on that one.

But anyway:

The reason I showed you this is precisely because it does not show anything concerning your original problem; and nor do a couple of other compilers I tried. So it suggests that maybe Keil is either being over-zealous or (horror of horrors) is wrong.

Maybe someone who obviously sees what is wrong and chooses not to say should actually back up their statement.

I think I got it.
What you really want to write is the following:

typedef int tQ32_16;
typedef tQ32_16 tVector3[3];

tQ32_16 Length_V3(const tVector3 vec)
{
    tQ32_16 result = vec[0];

    return result;
}

int main(void)
{
    tVector3 v1 = {1,2,3};
    tQ32_16  l1;

    l1 = Length_V3(v1);

    return l1;
}

The type tVector3 is an array. Arrays are passed to function by reference. So in essense the type of the argument is now const int* vec. In your original code it was const int** vec which doesn't make much sense.

Mike, Thanks.

Sorry for my very limited C skill. Just want to know if my understanding is correct or not.

#include <stdio.h>

int Length_V3( int vec[][3] )
{
    int result = vec[0][0];

    return result;
}

int main(void)
{
    int v1[1][3] = { { 0xA, 0xB, 0xC } };
    int l1;

    l1 = Length_V3(&v1[0]);
    printf( "l1 = %X", l1 );

    return 0;
}

Tested with X86/WinXP/Code::Blocks 10.05

Compiling: C:\WINDOWS\Temp\main_b.c
Linking console executable: C:\WINDOWS\Temp\main_b.exe
Process terminated with status 0 (0 minutes, 0 seconds)
0 errors, 0 warnings

l1 = A
Process returned 0 (0x0)   execution time : 0.016 s
Press any key to continue.