30 C Programming Basic Exercises for Intermediate with Solutions

Master intermediate C Programming skills with our comprehensive list of top 30 exercises. Dive into coding challenges that improve your understanding and proficiency in C Programming, setting a solid foundation for advanced challenges. Start your journey to C Programming mastery today!

Learning Objectives:

By the end of these exercises, you will be comfortable with intermediate concepts in C, such as pointers, arrays, dynamic memory allocation, and basic structures.

Exercise Instructions:

Start with the first exercise and attempt to solve it before checking the hint or solution.
Ensure you understand the logic behind each solution, as this will help you in more complex problems.
Use these exercises to reinforce your learning and identify areas that may require further study.

1. Write a function to check if a number is a palindrome.

Required Input:

Expected Output:

12321 is a palindrome

Code In C

#include int isPalindrome(int num) { // Your code here } int main() { int num = 12321; if (isPalindrome(num)) { printf("%d is a palindrome\n", num); } else { printf("%d is not a palindrome\n", num); } return 0; }

Output

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2. Implement a function to find the GCD of two numbers.

Required Input:

36 60

Expected Output:

GCD of 36 and 60 is 12

Code In C

#include int gcd(int a, int b) { // Your code here } int main() { int a = 36, b = 60; printf("GCD of %d and %d is %d\n", a, b, gcd(a, b)); return 0; }

Output

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3. Write a function to sort an array {5, 3, 8, 6, 2} in ascending order.

Required Input:

5 3 8 6 2

Expected Output:

Sorted array: 2 3 5 6 8

Code In C

#include void sortArray(int arr[], int n) { // Your code here } int main() { int arr[] = {5, 3, 8, 6, 2}; sortArray(arr, 5); printf("Sorted array: "); for (int i = 0; i < 5; i++) { printf("%d ", arr[i]); } printf("\n"); return 0; }

Output

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4. Implement a function to reverse a string "programming".

Required Input:

programming

Expected Output:

Reversed string: gnimmargorp

Code In C

#include #include void reverseString(char str[]) { // Your code here } int main() { char str[] = "programming"; reverseString(str); printf("Reversed string: %s\n", str); return 0; }

Output

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5. Write a function to calculate the factorial of a number (6) using recursion.

Required Input:

Expected Output:

Factorial of 6 is 720

Code In C

#include int factorial(int n) { // Your code here } int main() { int n = 6; printf("Factorial of %d is %d\n", n, factorial(n)); return 0; }

Output

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6. Write a function to find the minimum element in an array {3, 5, 2, 8, 1}.

Required Input:

3 5 2 8 1

Expected Output:

Minimum element: 1

Code In C

#include int findMin(int arr[], int n) { // Your code here } int main() { int arr[] = {3, 5, 2, 8, 1}; printf("Minimum element: %d\n", findMin(arr, 5)); return 0; }

Output

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7. Print the first 10 elements of the Fibonacci sequence.

Required Input:

Expected Output:

0 1 1 2 3 5 8 13 21 34

Code In C

#include void printFibonacci(int n) { // Your code here } int main() { printFibonacci(10); return 0; }

Output

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8. Count the number of words in a string "C programming is fun".

Required Input:

C programming is fun

Expected Output:

Number of words: 4

Code In C

#include #include int countWords(char str[]) { // Your code here } int main() { char str[] = "C programming is fun"; printf("Number of words: %d\n", countWords(str)); return 0; }

Output

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9. Write a function to find the second largest element in an array {12, 35, 1, 10, 34, 1}.

Required Input:

12 35 1 10 34 1

Expected Output:

Second largest element: 34

Code In C

#include int secondLargest(int arr[], int n) { // Your code here } int main() { int arr[] = {12, 35, 1, 10, 34, 1}; printf("Second largest element: %d\n", secondLargest(arr, 6)); return 0; }

Output

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10. Calculate the sum of the diagonal elements in a 3x3 matrix.

Required Input:

Matrix:
 1 2 3
 4 5 6
 7 8 9

Expected Output:

Sum of diagonal elements: 15

Code In C

#include int diagonalSum(int matrix[3][3]) { // Your code here } int main() { int matrix[3][3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}; printf("Sum of diagonal elements: %d\n", diagonalSum(matrix)); return 0; }

Output

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