30 C++ Basic Exercises for Intermediate with Solutions

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

Learning Objectives:

By the end of these exercises, you will be skilled in intermediate C++ concepts, such as classes, inheritance, pointers, and dynamic memory management.

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 program to find the GCD (Greatest Common Divisor) of two numbers using the Euclidean algorithm.

Required Input:

int a = 56, b = 98;

Expected Output:

GCD = 14

Code In Cpp

#include int main() { int a = 56, b = 98; // Logic to find GCD return 0; }

Output

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2. Implement a program to merge two sorted arrays into one sorted array.

Required Input:

int arr1[] = {1, 3, 5}, arr2[] = {2, 4, 6};

Expected Output:

Merged array: 1 2 3 4 5 6

Code In Cpp

#include int main() { int arr1[] = {1, 3, 5}, arr2[] = {2, 4, 6}; // Logic to merge arrays return 0; }

Output

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3. Create a program that counts the number of words in a given string.

Required Input:

std::string str = "Count the number of words in this string";

Expected Output:

Word Count = 8

Code In Cpp

#include #include #include int main() { std::string str = "Count the number of words in this string"; // Logic to count words return 0; }

Output

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4. Write a program to check if a given number is a power of two.

Required Input:

int n = 16;

Expected Output:

16 is a power of 2.

Code In Cpp

#include int main() { int n = 16; // Logic to check power of two return 0; }

Output

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5. Create a program to implement binary search on a sorted array.

Required Input:

int arr[] = {2, 4, 6, 8, 10}; int target = 6;

Expected Output:

Element found at index: 2

Code In Cpp

#include int main() { int arr[] = {2, 4, 6, 8, 10}, target = 6; // Logic for binary search return 0; }

Output

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6. Write a program to find the second largest number in an array.

Required Input:

int arr[] = {3, 5, 1, 4, 2};

Expected Output:

Second largest number = 4

Code In Cpp

#include int main() { int arr[] = {3, 5, 1, 4, 2}; // Logic to find second largest number return 0; }

Output

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7. Create a program to reverse an integer without converting it to a string.

Required Input:

int n = 12345;

Expected Output:

Reversed number = 54321

Code In Cpp

#include int main() { int n = 12345; // Logic to reverse the integer return 0; }

Output

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8. Write a program to find the sum of the digits of a number recursively.

Required Input:

int n = 12345;

Expected Output:

Sum of digits = 15

Code In Cpp

#include int sumOfDigits(int n); int main() { int n = 12345; // Logic to find the sum of digits return 0; }

Output

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9. Implement a program to check if two strings are rotations of each other.

Required Input:

std::string str1 = "abcd", str2 = "cdab";

Expected Output:

Strings are rotations of each other.

Code In Cpp

#include #include int main() { std::string str1 = "abcd", str2 = "cdab"; // Logic to check for rotations return 0; }

Output

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10. Write a program to implement a simple text-based menu for user choices.

Required Input:

N/A (User interaction through the menu)

Expected Output:

Menu:
1. Option 1
2. Option 2
3. Option 3
4. Exit
Choose an option: Exiting...

Code In Cpp

#include int main() { // Logic for menu-driven program return 0; }

Output

Click Run Button to view compiled output

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