How can we pass pointers by value. Lets say even if it creates a copy of the pointer. The address stored by the pointer is the same. So when we dereference it shouldnt it get updated(as its just a memory address)?
On Thu, Jan 27, 2011 at 5:39 PM, ritu <[email protected]> wrote: > Here you are passing record pointer by value. > > as you call insert(record, 5),stack frame of insert contains a copy > of record.after this value is modified by calling program,it should > be either returned explicitly to caller program or needs to be passed > by reference,so that calling program refers to it always by address. > > > On Jan 27, 4:17 pm, nishaanth <[email protected]> wrote: > > Hi guys, > > > > I have a small doubt regarding pointers and functions. > > > > Consider the following prototype > > > > void insert(bst * head, int data); > > > > This function creates a node and inserts the data in the node. Lets say i > > call this function iteratively from main. > > > > main(){ > > > > bst* record=NULL; > > insert(record, 5); > > insert(record, 8); > > > > } > > > > I see that record is not getting modified. Now is this related to call by > > value. But since we are passing pointers shouldnt the change get > reflected > > in main. > > isnt is similar to passing an array? > > Enlighten me in this regard. I am tired of segfaults :( > > > > Regards, > > S.Nishaanth, > > Computer Science and engineering, > > IIT Madras. > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]<algogeeks%[email protected]> > . > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > > -- S.Nishaanth, Computer Science and engineering, IIT Madras. -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
