Sequence Pointers in C

0 30

Sequence pointers in C are used to traverse or manipulate sequences of data stored in contiguous memory locations, such as arrays.

They are crucial for efficient array operations, data traversal, and memory management.

A sequence pointer in C is a point in the program's execution where the side effects of previous evaluations are guaranteed to have taken place and no side effects from subsequent evaluations have taken effect yet.

Examples:

Traversing an Array using Sequence Pointers

#include<stdio.h> 

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int *ptr = arr;  // Pointing to the first element

    printf("Array elements: ");
    while(ptr < arr + 5) {
        printf("%d ", *ptr);
        ptr++;  // Moving to the next element
    }

    return 0;
}

Output:

Array elements: 1 2 3 4 5

Swapping Two Array Elements using Sequence Pointers

#include<stdio.h> 

void swap(int *ptr1, int *ptr2) {
    int temp = *ptr1;
    *ptr1 = *ptr2;
    *ptr2 = temp;
}

int main() {
    int arr[] = {5, 3, 1, 4, 2};
    int *ptr1 = arr;
    int *ptr2 = arr + 4;

    swap(ptr1, ptr2);

    printf("Array after swapping: ");
    for(int i = 0; i < 5; i++) {
        printf("%d ", arr[i]);
    }

    return 0;
}

Output: