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Full Discussion: Arrays in C++
Top Forums Programming Arrays in C++ Post 302585802 by JohnGraham on Thursday 29th of December 2011 09:18:08 AM
Old 12-29-2011
Quote:
Originally Posted by John Tate
When dealing with arrays, it seems if I pass an array to a function although I cannot return an array - if the array is changed it changes for the whole program. The array is seemingly global.
Yes, this is a feature of both C and C++ - array names automatically decay into pointers where appropriate. When passing an array to a function, the array is never placed on the stack (how would the called function know how large it is?) so instead a pointer is passed, and any modification through the pointer will be seen to the calling function.
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ARRAY_PUSH(3)								 1							     ARRAY_PUSH(3)

array_push - Push one or more elements onto the end of array

SYNOPSIS
int array_push (array &$array, mixed $value1, [mixed $...]) DESCRIPTION
array_push(3) treats $array as a stack, and pushes the passed variables onto the end of $array. The length of $array increases by the num- ber of variables pushed. Has the same effect as: <?php $array[] = $var; ?> Note If you use array_push(3) to add one element to the array it's better to use $array[] = because in that way there is no overhead of calling a function. Note array_push(3) will raise a warning if the first argument is not an array. This differs from the $var[] behaviour where a new array is created. PARAMETERS
o $array - The input array. o $value1 - The first value to push onto the end of the $array. RETURN VALUES
Returns the new number of elements in the array. EXAMPLES
Example #1 array_push(3) example <?php $stack = array("orange", "banana"); array_push($stack, "apple", "raspberry"); print_r($stack); ?> The above example will output: Array ( [0] => orange [1] => banana [2] => apple [3] => raspberry ) SEE ALSO
array_pop(3), array_shift(3), array_unshift(3). PHP Documentation Group ARRAY_PUSH(3)
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