sizeof a string

hi all.

yet again question sizeof operator.
first example of code (without setup, loop etc.)
;

code: [select]

void function (char *_min, char *_max) (
 byte = sizeof(_min);
 byte b = sizeof(_max);
 serial.println(a, dec);
 serial.println(_min);
 serial.println(b, dec);
 serial.println(_max);
}

function ("0", "36");    // first call
function ("-10, "36");    // second call

desired effect;
that first call prints

code: [select]


1  (size of 0)
0  
2  (size of 36)
36
and second call prints

code: [select]


3  
-10
2
36

this get;

code: [select]

2     //first call
0
2
36
2     // second call
-10
2
36

basically don't understand sizeof operator evaluating. strings not change while running program.

hoping explained problem enough,

jeroen

sizeof returns size in bytes of variable give it, not value associated variable. in c language, string variable pointer array of characters comprising string. arduino pointer 2 byes, sizeof correctly returns.

use strlen function length of string

Arduino Forum > Forum 2005-2010 (read only) > Software > Syntax & Programs > sizeof a string

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