memaddr.c

定义一个表示三维空间坐标点的类

/**
* @file   memaddr.c
* @brief  Display variable memery address and value.
* @author [e-mail]
*/

#include <stdlib.h>

typedef struct var {
    short  vshort;
    long   vlong;
    float  vfloat;
    double vdouble;
    char   vchar;
    char   vstr[4];
    char   *vpchar;
    short  *vpshort;
} VAR;

VAR global_var = {
    -0x1234,
    0x12345678,
    100.01,
    100.01,
    'A',
    "abc",
    &global_var.vchar,
    &global_var.vshort,
};


void show_variable_value (VAR * var)
{
	printf ("vchar   (%d): %p: %c\n",sizeof (char),  &var->vchar,  var->vchar  );
	printf ("vshort  (%d): %p: %04Xh\n",sizeof (short), &var->vshort, var->vshort );
	printf ("vlong   (%d): %p: %08Xh\n",sizeof (long),  &var->vlong,  var->vlong  );
	printf ("vfloat  (%d): %p: %f\n",   sizeof (float), &var->vfloat, var->vfloat );
	printf ("vdouble (%d): %p: %lf\n",  sizeof (double),&var->vdouble,var->vdouble);
	printf ("vstr    (%d): %p: %s\n",   sizeof (var->vstr), &var->vstr, var->vstr );
	printf ("vpchar  (%d): %p: %0*Xh\n",sizeof (char *),&var->vpchar, sizeof (char *) * 2, var->vpchar );
	printf ("vpshort (%d): %p: %0*Xh\n",sizeof (short*),&var->vpshort,sizeof (short*) * 2, var->vpshort);
	printf ("var    (%d): %p\n",        sizeof (VAR), var);
	printf ("\n");
}


void show_variable_memory (VAR * var)
{
}


int main (int argc, char *argv[])
{
    VAR local_var = {
        0x1234,
        0x9ABCDEF,
        100.01,
        100.01,
        'B',
        "abc",
        &local_var.vchar,
        &local_var.vshort,
    };
    
    show_variable_value  (&global_var);
    show_variable_memory (&global_var);

    show_variable_value  (&local_var );
    show_variable_memory (&local_var );

    getchar ();
    return (0);
}