Mastering Pointers in C : A Course on Efficient Programming

Explain how pointers store addresses, dereference with the indirection operator, and print values, using them for swapping numbers without a temp variable, while highlighting advantages with arrays, structures, and functions.

Explore pointer to a pointer, a double pointer that holds another pointer's address. Apply the syntax and access values with * and ** in a concrete a = 10 example.

Demonstrate using a single pointer and a pointer to a pointer to modify a memory location x, with dereferencing updating x from 10 to 35 by adding 25.

Apply call by reference by passing the addresses of two numbers to a function using pointers to compute and display their sum, after reading inputs.

Demonstrate using a pointer to a function in C by declaring a function pointer, assigning it the address of addition, calling it to compute and display the sum.

Demonstrate pointer arithmetic by incrementing and decrementing a pointer by one memory location, where each location equals the size of an integer, and observe the resulting address changes.

Explore using pointers to access a one-dimensional array by its base address, dereferencing, and pointer arithmetic, to read and display elements with scanf and printf.

Access a string in C using a pointer to its base address. Print each character until the null terminator.

Compute the length of a string with a character pointer and a while loop until the null terminator, then show a function using a temp pointer to return its length.

Learn to copy a string into another using a pointer-based my_strcpy function, iterating S1 to S2 character by character and terminating with a null character.

Implement a custom strcat function using two character pointers to concatenate s1 into s2 by moving to s2's end, appending s1, and terminating with a null character.

Learn to implement string concatenation in C using pointers by building a custom strcat, moving to the end of the destination, copying from the source, and appending a null terminator.

Implement a string comparison using pointers with a custom strcmp function that returns the difference of the first non-matching characters and demonstrate results like -15 and 0 for example strings.

Master reading, storing, and displaying a two‑dimensional array with pointers, using pointer to first row, pointer to i'th row, and pointer to i'th element for element access.

Explore dynamic memory in c by comparing static vs dynamic allocation, and master using malloc, calloc, realloc, and free to manage memory and pointers efficiently.

Allocate memory dynamically with malloc, read and store elements in a dynamically allocated array, display them, and deallocate memory after use.

Explore calloc, a dynamic memory function that allocates n blocks of a given size and initializes all blocks to zero, unlike malloc which leaves garbage values.

Resize a memory block allocated by malloc or calloc using realloc, which relocates memory and updates the pointer to the new size.

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