int and float pointer variables

[punjabian263]

Hello guys, i need some help, how many bytes an int, float pointer variable in ram, a am using win2000,xp on intel machine.

i make program that display

code:
--------------------------------------------------------------------------------


int i=4;
int *p;
p=&i;
clrscr();
cout<<p<<endl; //0x8f1fff4
p++;
cout<<p<<endl; //0x8f1fff6
float p1=1.1;
float *p2;
p2=&p1;
cout<<p2<<endl; //0x8f1fff0
p2++;
cout<<p2; //0x8f1fff4

--------------------------------------------------------------------------------


how many bytes these int and float pointers take in ram, according to this it is showing
int * takes 2 bytes
float * takes 4 bytes.

thanks for clearing my concept.

[joscollin]

This is correct.

integer pointer takes 2 bytes and
float pointer takes 4 bytes.

[punjabian263]

THANKS JOSCOLLIN

[TDM]

This is correct.

integer pointer takes 2 bytes and
float pointer takes 4 bytes.

That's weird with the following code

float *TestFloat;
int *TestInt;

unsigned int SizeFloat=sizeof(TestFloat);
unsigned int SizeInt=sizeof(TestInt);

SizeFloat=4 and SizeInt=4 when checked in the debugger.

TDM

[Andreas Masur]

Originally posted by joscollin
This is correct.

integer pointer takes 2 bytes and
float pointer takes 4 bytes.

This is not correct...the size of a pointer is the same and equals 4 bytes on a 32-bit processor...

[joscollin]

Depends on the h/w and os we use.
Anyway this is true in ANSI C.

[nsh123]

Depends on the h/w and os we use.
Anyway this is true in ANSI C.

Are you saying that by ANSI C it is correct that float * and int * can take different sizes?

IMO then using void pointers will make little sense.

Regards

[Andreas Masur]

Originally posted by nsh123
Are you saying that by ANSI C it is correct that float * and int * can take different sizes?

No...ANSI C does not have to do much with it...the size of variables are based on the architecture in the first place...

[filthy_mcnasty]

pointers are the same size irregardless of type.

char *a;
int *b;
unsigned long *c;
double *d;


no matter what you put, the size is always going to be 4 on a 32 bit system. remember, your pointer is just something that "points" to a spot in memory. if it was only 2 bytes you could only point to memory in the first 64kb and well that obviously doesn't cut it anymore.