objective c - What does the "&" character mean prepended to a var in obj-c -

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hi,

consider these method calls

1) audiofileopenurl(infileurl,kaudiofilereadpermission,kaudiofilemp3type,fileid)

2) audiofileopenurl(infileurl,kaudiofilereadpermission,kaudiofilemp3type,&fileid)

the second call has "&" symbol before fileid parameter. "&" mean?

that's not objective-c feature. it's c "address of" operator. gives memory address of variable opposed contents.


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