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Assignment sample solution of CSE220 - Fundamentals of C Programming

Question 1: What are pointers in C, and how are they used?

Question 2: Explain the difference between arrays and structures in C.

Question 3: What is recursion, and how is it implemented in C?

  1. 1
  2. 2

Programing Assignment Sample

Q1:

Answer :

Pointers in C are variables that store the memory address of another variable. They enable efficient data manipulation, dynamic memory allocation, and function parameter passing. For example:

int a = 10;
int *p = &a;
printf ("%d", *p);
Here, p is a pointer storing the address of a, and *p dereferences it to access the value of a. Pointers are essential in scenarios like array handling, where they allow direct memory access, enhancing performance and flexibility in low-level programming tasks.

Q1:

Answer :

Arrays in C are collections of elements of the same data type, stored in contiguous memory locations. For example, int arr[5] is an integer array. Structures, on the other hand, group variables of different data types under one name. For instance:

struct Student {
int id;
char name[50];
};
Arrays are ideal for homogeneous data, while structures are used to represent complex data models. Both are critical for efficient data organization and manipulation in C programming.

Q1:

Answer :

Recursion in C is a technique where a function calls itself to solve smaller instances of a problem until a base condition is met. For example, calculating a factorial using recursion:

int factorial(int n) {
if (n == 0) return 1;
return n * factorial(n - 1);
}
Recursion simplifies problems like tree traversals and mathematical computations by breaking them into smaller, manageable parts. However, it must be used cautiously to avoid stack overflow errors due to excessive recursive calls.