int age = 25; int *ptr; // Declaration of a pointer to an integer ptr = &age; // Initialization: ptr now stores the address of age Use code with caution. 3. The De-referencing Operator ( * )
Students frequently search for the PDF version of this book due to its unique pedagogy:
#include int main() int i = 3; printf("Value of i = %d\n", i); printf("Address of i = %u\n", &i); // %u prints the address as an unsigned integer return 0; Use code with caution. Core Concept 2: The Anatomy of a Pointer Variable understanding pointers in c by yashwant kanetkar pdf
To tell the compiler that a variable is intended to store an address rather than a raw value, you use the asterisk ( * ) operator during declaration: int *j; Use code with caution.
: This operator retrieves the memory address of a variable. int age = 25; int *ptr; // Declaration
: Includes basic address concepts, pointer arithmetic, strings, structures, and data structures like linked lists.
Known as generic pointers, they can point to any data type but must be explicitly type-cast before dereferencing. 6. Common Pointer Pitfalls to Avoid Core Concept 2: The Anatomy of a Pointer
If you are looking through the chapters of Understanding Pointers in C , you will find comprehensive coverage of advanced pointer mechanics, including:
int *make_array(size_t n) int *a = malloc(n * sizeof *a); if (!a) return NULL; return a;
A dangling pointer occurs when a pointer still points to a memory address after the memory allocated to it has been freed or deallocated.