What is the Difference between arrays and pointers?
- Pointers are used to manipulate data using the address. Pointers use* operator to access the data pointed to by them
- Arrays use subscripted variables to access and manipulate data.
Array variables can be equivalently written using pointer expression.
Program to show that array and pointers are different
#include
int main()
{
int arr[] = {10, 20, 30, 40, 50, 60};
int *ptr = arr;
// sizof(int) * (number of element in arr[]) is printed
printf("Size of arr[] %ld\n", sizeof(arr));
// sizeof a pointer is printed which is same for all type
// of pointers (char *, void *, etc)
printf("Size of ptr %ld", sizeof(ptr));
return 0;
}
int main()
{
int arr[] = {10, 20, 30, 40, 50, 60};
int *ptr = arr;
// sizof(int) * (number of element in arr[]) is printed
printf("Size of arr[] %ld\n", sizeof(arr));
// sizeof a pointer is printed which is same for all type
// of pointers (char *, void *, etc)
printf("Size of ptr %ld", sizeof(ptr));
return 0;
}
Output:
Size of arr[] 24
Size of ptr 8
Assigning any address to an array variable is not allowed.
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