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Write a short note on pointer declaration
A simple variable in a program is stored in a certain number of bytes at a particular memory location, or address, in the machine. Pointers are used in programs to access memory and manipulate addresses.
The first things to do with pointers are to declare a pointer variable, set it to point somewhere, and finally manipulate the value that it points to. A simple pointer declaration looks like this:
int *ip;
The asterisk means that ip, the variable we're declaring, is not of type int, but rather of type pointer-to-int. (Another way of looking at it is that *ip, which as we'll see is the value pointed to by ip, will be an int.)
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