#include void swap(int *a, int *b) int temp; temp = *a; *a = *b; *b = temp; int main() int x = 10, y = 20; printf("Before swap: x = %d, y = %d\n", x, y); swap(&x, &y); // Passing the addresses printf("After swap: x = %d, y = %d\n", x, y); return 0; Use code with caution. Pointer Arithmetic
By default, C passes variables to functions "by value" (making a temporary duplicate copy). Pointers allow functions to access and permanently modify the original variables in the calling function.
: Imagine a colony with thousands of houses. Each house has a specific address, and inside each house, people (data) reside.
Before diving into the PDF specifics, it is important to understand the author’s credibility. is an Indian computer science educator and author who has written over 25 books on programming languages including C, C++, Java, and Python. His most famous works include "Let Us C" and "Understanding Pointers in C" .
Understanding Pointers in C by is a focused guide designed to demystify one of C's most challenging concepts through clear explanations and practical examples. Key Topics Covered
and has gone through multiple revisions, including the 5th edition released in 2019. BPB Online Understanding Pointers in C: Yashavant Kanetkar
Kanetkar emphasizes this rule: 5. Advanced Pointer Architectures
One day, while browsing online, Rahul stumbled upon a legendary book: "Understanding Pointers in C" by Yashwant Kanetkar. The book was available in PDF format, and Rahul couldn't resist the temptation to download it. He had heard great things about Kanetkar's writing style, which was known for being clear, concise, and easy to understand.
The book uses great visual mental models to help you understand what is physically happening to computer memory.