When declaring pointers we may want to explicitly specify which variable we want them to point to:int number;int *tommy = &number;The behavior of this code is equivalent to:int number;int *tommy;tommy = &number;When a pointer initialization takes place we are always assigning the reference value to where the pointer points (tommy), never the value being pointed (*tommy). You must consider that at the moment of declaring a pointer, the asterisk (*) indicates only that it is a pointer, it is not the dereference operator (although both use the same sign: *). Remember, they are two different functions of one sign. Thus, we must take care not to confuse the previous code with:int number;int *tommy;*tommy = &number;that is incorrect, and anyway would not have much sense in this case if you think about it.As in the case of arrays, the compiler allows the special case that we want to initialize the content at which the pointer points with constants at the same moment the pointer is declared: const char * terry = "hello"; In this case, memory space is reserved to contain "hello" and then a pointer to the first character of this memory block is assigned to terry. If we imagine that "hello" is stored at the memory locations that start at addresses 1702, we can represent the previous declaration as:It is important to indicate that terry contains the value 1702, and not 'h' nor "hello", although 1702 indeed is the address of both of these.The pointer terry points to a sequence of characters and can be read as if it was an array (remember that an array is just like a constant pointer). For example, we can access the fifth element of the array with any of these two expression:*(terry+4)terry[4]Both expressions have a value of 'o' (the fifth element of the array).
C++
Topic: Pointers
Explain about Pointer initialization ?
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Explain about Reference operator (&) ?
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Where do we use pointers?
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Allocating a memory from the "Free Store" ?
Explain about Allocating a memory with new operator ?
Explain about De-allocating a memory with delete operator ?
Explain about Data type class pointers with example ?
Explain about memory leaks associated with pointers ?
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When local variable’s name is same as member’s name
What are function Pointer Syntax ?
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What are Function Pointers in the Wild ?
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What are Benefits of Function Pointers ?
Where They get Useful Function Arguments ?
Explain Smart Pointers (Modern C++) ?
What are Uses for smart pointers ?
What are Kinds of Smart Pointers ?
What are another Use of Pointers Efficient Array Processing ?
Explain about C++ Pointers and new
What are problems with pointers ?
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How to initialize a vector of pointers?
Explain about c++ Pointer Arithmetic ?
Explain about incrementing a Pointer ?
Explain decrementing a Pointer ?
Explain pointer Comparisons ?
