₦airaland Forum

Hi guys, I need help with this php code. i'm trying this simple binary-search code to confirm whether an input number is present in an ordered array, but i'm not getting any feedback from it so far. it's supposed to reply TRUE or FALSE. i donno what's wrong. thx.

<?php 

//sample array
$MyArray =array(12, 13, 17, 21, 24, 35, 37, 42, 49, 50, 53, 60);

//Define search function
function confirm_value(& $Array, $Value){
	$Value1 =$Value;			       //value to check for
	$High =count($Array) -1;	               //last array index
	$Low =0;					       //first array index
	$Index;					       //selected index
	
	
	while($Low <= $High){
	$Index =(int)($High + $Low)/2;
	
	if ($Array[$Index] ==$Value1){
		return TRUE;
	}
	else if ($Array[$Index] <$Value1){
		$High =$Index -1;
	}
	else $High =$Index +1;
	
	}
	return FALSE;
}

//try search function
echo confirm_value($MyArray, 49);

sorry guys, i tried posting with the site code button but the fonts r too small. so i'm reposting with the quote button.

<?php
//sample array
$MyArray =array(12, 13, 17, 21, 24, 35, 37, 42, 49, 50, 53, 60);

//Define search function
function confirm_value(& $Array, $Value){
$Value1 =$Value;       //value to check for
$High =count($Array) -1;               //last array index
$Low =0;       //first array index
$Index;       //selected index


while($Low <= $High){
$Index =(int)($High + $Low)/2;

if ($Array[$Index] ==$Value1){
return TRUE;
}
else if ($Array[$Index] <$Value1){
$High =$Index -1;
}
else $High =$Index +1;

}
return FALSE;
}

//try search function
echo confirm_value($MyArray, 49);

thanx man!! i see my mistake now. My search was moving away from $Value1 instead of towards it. cheers.

Ah arrays, every student's nightmare. I will advice you when dealing with arrays to avoid interfering with the index for example $High = count($Array) - 1;

-1 can lead to logic errors later in your program.

@ Omo t' o dun.

Kindly advice me on how to get a C++ compiler. I need it pls.

Ah well, there be many compilers, but i kinda prefer "codeblocks" - u might want to look it up in google.
But wait, i think alhaji omo_to_dun uses a different compiler o.