source: doc/theses/mike_brooks_MMath/programs/bkgd-carray-mdim.c@ 421b242

#include <stdio.h>
#include <assert.h>
#include <stdlib.h>

#define SHOW(x, fmt) printf( #x ": " fmt "\n", x )

#ifdef ERRS
#define ERR(...) __VA_ARGS__
#else
#define ERR(...)
#endif



int main() {
        float mx[3][10];
        static_assert( sizeof(float) == 4 );    $\C[3.25in]{// floats (atomic elements) are 4 bytes}$
        static_assert( sizeof(void *) == 8 );   $\C{// pointers are 8 bytes}$

        static_assert( sizeof(mx) == 120 );             $\C{// the array, float[3][10]}$
        static_assert( sizeof(mx[0]) == 40 );   $\C{// its first element, float[10]}$
        static_assert( sizeof(mx[0][0]) == 4 ); $\C{// its first grand element, float}$

        static_assert( sizeof(&(mx)) == 8 );    $\C{// pointer to the array, float(*)[3][10]}$
        static_assert( sizeof(&(mx[0])) == 8 ); $\C{// pointer to its first element, float(*)[10]}$
        static_assert( sizeof(&(mx[0][0])) == 8 );      $\C{// pointer to its first grand-element, float*}\CRT$

        float (*pm)[3][10] = &(mx);
        float (*pm0)[10] = &(mx[0]);
        float *pm00 = &(mx[0][0]);

        static_assert( (void *)&mx == (void *)&(mx[0] ) );
        static_assert( (void *)&mx == (void *)&(mx[0][0]) );

        assert( (void *) pm == (void *) pm0 );
        assert( (void *) pm == (void *) pm00 );

//      float (*b[3])[10];
        float * b[3];
        for (int i = 0; i < 3; i ++) {
                b[i] = malloc(sizeof(float[10]));
        }
        mx[2][3];
        b[2][3];
/*

*/

}

// Local Variables: //
// compile-command: "sed -f sedcmd bkgd-carray-mdim.c | gcc-11 -Wall -Wextra -x c -" //
// End: //