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Why multidimensional array element access using indirection operator?
Wiki User
∙ 8y ago
The number of dimensions is immaterial. All arrays are implemented as a one dimensional array. A multidimensional array is simply an array where every element is itself an array.
The only thing actually known about any array is that its name is a reference to the start address. Unlike an ordinary (non-array) variable, the elements in the array do not have names, we can only refer to them by their memory offsets from the start of the array. As such, in order to obtain the values stored at those offsets, we must dereference them. While the subscript operator gives us notational convenience, it's easy to forget that there's actually pointer arithmetic and dereferencing going on behind the scenes.
Wiki User
∙ 8y ago
Wiki User
∙ 13y agoArray elements can be pointers, and pointers can point to array elements, if that's what you mean.
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How can you access an array without using the suffix operator?
An array's name implicitly converts to a pointer to the first element of the array at the slightest provocation. Thus to access the first element of the array, the array name suffices. To access any other element in the array without using the suffix operator, use offset pointer arithmetic. For example: int a[] = {2, 4, 6, 8, 10}; int b; b = *(a+3); assert (b == 8); Here, (a+3) points to the 4th element (offset 3). Dereferencing this address returns the value of that element, in this case 8.
Which operator is used 2 access ahidden global variables?
To access a hidden global variable, use the scope resolution operator ::
Which operator is used to indirectly access a member of a struct?
pointer -> fieldname
Which operator allows you to search for a range of values in one field?
The answer is Between in an Access question.
What is the purpose of the dereference operator when used with a pointer variable?
Data type is mandatory in every variable-declaration.Example:int i; -- integerint *pi; -- integer-pointerint ai[10]; -- integer-arrayint *api[10]; -- array of integer-pointersint (*api)[10]; -- pointer to integer-array
How can you access an array without using the suffix operator?
An array's name implicitly converts to a pointer to the first element of the array at the slightest provocation. Thus to access the first element of the array, the array name suffices. To access any other element in the array without using the suffix operator, use offset pointer arithmetic. For example: int a[] = {2, 4, 6, 8, 10}; int b; b = *(a+3); assert (b == 8); Here, (a+3) points to the 4th element (offset 3). Dereferencing this address returns the value of that element, in this case 8.
What is the purpose of the operator '' when used with a pointer variable?
When a pointer variable stores a non-zero memory address, we can use the dereference operator to access the value stored at that address. This is what we mean by dereferencing and is also known as indirection because we can access a value indirectly through a pointer variable. Note that if the stored address is zero, we must not dereference the pointer as the zero address indicates that the pointer is not currently pointing at any object in particular. The zero address is a reserved address so no object can ever be allocated to it.
Who designed Microsoft Access?
operator
Which operator is used 2 access ahidden global variables?
To access a hidden global variable, use the scope resolution operator ::
What does the dot member access operator indicate in the text SystemWindowsFormsLabel?
The dot member access operator (or, in simple terms, the period) specifies the hierarchy of namespaces.
Which operator is allow to access hidden global variable?
The scope resolution operator, ::, overrides local scope and allows access to objects that are hidden due to global to local scope rules.
Which operator is used to indirectly access a member of a struct?
pointer -> fieldname
Which access modifier makes an element available anywhere to any class?
The public access modifier will make an element available to any class.
Which operator allows you to search for a range of values in one field?
The answer is Between in an Access question.
What operator enables you to access structures members using pointers to the structure?
(*ptr).field or ptr->field
Multiple indirection in c language?
C uses pointers for indirection. So, using a pointer to a pointer would be multiple indirection. For example, the following code uses multiple indirection:int i = 42;int *pi = &i;int **ppi = π**ppi++;printf("i is now %d\n", i);
What is the purpose of the dereference operator when used with a pointer variable?
Data type is mandatory in every variable-declaration.Example:int i; -- integerint *pi; -- integer-pointerint ai[10]; -- integer-arrayint *api[10]; -- array of integer-pointersint (*api)[10]; -- pointer to integer-array
