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Difference between arrays and pointers in c language?

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Answered 2011-03-11 14:45:28

There is a difference: a pointer is a number that literally points to a place in memory. Arrays are groupings of a type. There is a close relationship between pointers and arrays, however: every expression with arrays (example: array[i]) can be expressed with pointers (example: *(array + i)), because for the computer, an array is just a list of pointers to the type of the array.

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Some of them are: 1. char, short, int, long, float, double 2. pointers to these 3. arrays of these 4. arrays of pointers 5. pointers to arrays ...

Difference between arrays and linked list?

array and pointer both are derived datatypes..

Yes. All string variables are pointers as are other arrays.

In computer terminology, pointer is a programming language. It is an important part of C language. Uses of pointers: C pointer, C arrays, C linked list, memory-mapped hardware, Pass-by-address using pointers, Dynamic memory allocation.

for arrays you can list the different arrays and what attributes that you give to them.

That would include header files, data types, loops, functions, pointers, arrays

A hard question to answer. If you do not understand the concept of array and the concept of pointer nothing I can tell you will be meaningful. Learn about arrays and pointers and the answer will be self evident.

arrays are the reserved sets of variables, which are supposed to store the similar data. pointers are the special variables which store the address of other variables.

Arrays are implemented as pointers in c.

Because of pointers and that all arrays are really pointers. A pointer something like *pointer can also be written as pointer[0] and *(pointer + 1) can also be written as pointer[1]

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You can define pointers to every data-type (including elementary types, structures, unions, arrays and function), plus you can define generic pointers as 'void *'.

It is not possible to declare a two-dimensional array using an array of pointers in any programming language, but many programming languages support declarations of N-dimensional arrays of pointers.The exact syntax varies with the programming language, and requires support for N-dimensional arrays and pointers. In C, the following declares an array of pointer variables, each implemented as pointer to the generic type "void":void* array_1D[10];The type of the expression array_1D is "void * const."The following example expands on the previous one by declaring a two-dimensional array of "void" pointers:void* array_2D[10][20];The type of the expression array_2D is "void ** const."The last example declares a 3-dimensional array of "void" pointers, which can be seen as a 2-dimensional array of arrays of pointers:void* array_3D[10][20][30];

A pointer is a variable that may contain a memory address, or NULL (zero). An array is collection of data, usually residing in a contiguous block of memory, where every element is accessed as an offset from the beginning of the array.

1.Dynamic memory allocation is possible with pointers. 2.passing arrays and structures to functions 3.passing addresses to functions. 4.creating data structures such as trees,linked lists etc

Structures and arrays are somewhat similar in that they both "contain" multiple items of data in one package. Arrays contain several copies of the same type of data one after another. An array's elements must all be "char", "int", "float", pointers of a single type, structs or any other type. Structures, on the other hand, contain multiple variables, each with a specific data type. Structures can also contain arrays. The actual, literal differences between structures and arrays involve understanding addresses and pointers, which may come in handy later on during your foray into more advanced concepts in C.

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A character array is list of pointers that point to characters. The way to use an array would depend on the language. Most arrays are 0 indexed meaning they begin at 0.

a pointer is a derived data type in c. pointers are undoubtedly one of the most distinct and exciting features of c has added power and flexibility to the language. *pointers are more efficient in handling arrays and tables. *pointer can be used to support dynamic memory management. *pointers reduce length and complexity of programs. *increase the execution speed and thus reduce the program execution time. by following character's real power of c lies in proper use of pointers. pointer is called the jewel of c-language.

Nothing whatsoever. They are exactly the same.

What is your understanding of structures? Discuss how structures work in programming

Arrays, pointers, structures and unions are all derived types in C. These types build upon the built-in types and can be used recursively to derive new types.

The inherit function `array_dif($arrayOne, $arrayTwo, $arrayThree, ...)` is likely what you're looking for. It compares two or more arrays, and returns an array of values that are unique among the arrays.

If the array is static you can simply point at the first element. For dynamic arrays you can allocate a contiguous block to a single pointer which can then be subdivided using a one-dimensional array of pointer to pointers, each of which points to a one-dimensional array of pointers, each of which points to a separate object within the array. For extremely large arrays, however, it is better to split the elements into separate one-dimensional arrays, by creating a one-dimensional array of pointer to pointers first, then allocating each of those pointers to a separate one-dimensional array of pointers, each of which points to a separate one-dimensional array of objects. Either way, you must destroy all the individual arrays in the reverse order of creation.

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