Added section "Relationship to pointers", fixed misspelled "Initializiation" (#31683)
* Added section "Relationship to pointers" * fix: changed c++ to cpppull/27485/head^2
parent
db6756aaa2
commit
dc9839d908
|
@ -80,7 +80,6 @@ delete[] dynamic;
|
|||
```
|
||||
|
||||
### Access:
|
||||
|
||||
Elements of an array are accessed using their index. The index of the first element in the array is zero and the second element's index is 1 and so on. You can think of the index of an element as the unit "distance" from the beginning of the array, that is the first element is 0 units from the start.
|
||||
Examples using the number array from above:
|
||||
```cpp
|
||||
|
@ -89,9 +88,25 @@ numbers[2] = 55; // Sets the third position (3) to the new number 55
|
|||
//numbers[] is now: {1, 2, 55, 4, 5}
|
||||
```
|
||||
|
||||
### What is the difference between arrays and pointers?
|
||||
### Relationship to pointers
|
||||
An array is a collection of variables of similar data type that are stored in contiguous memory locations whereas the pointer is a variable that stores the memory address of another variable i.e. a pointer is a variable that points to the location of another variable.
|
||||
|
||||
An array's name functions as an immutable pointer to the array's first element. If we have:
|
||||
|
||||
```cpp
|
||||
int arr[3] = {10,45,3}
|
||||
int * ptrarr;
|
||||
ptrarr = arr;
|
||||
for(int i=0; i<3; i++)
|
||||
cout << arr[i] << " from array, and " << *(ptrarr + i) << " from pointer\n";
|
||||
```
|
||||
we'll get the following output:
|
||||
|
||||
```cpp
|
||||
10 from array, and 10 from pointer
|
||||
45 from array, and 45 from pointer
|
||||
3 from array, and 3 from pointer
|
||||
```
|
||||
|
||||
How to insert and print array elements:
|
||||
```cpp
|
||||
|
|
Loading…
Reference in New Issue