Best 5 Basic C++ Programs For Beginners

Introduction

In this article, we will explore the best 5 basic C++ programs that beginners can learn to build a solid foundation in the language.

Each program will be explained in detail, providing step-by-step instructions and explanations of the code.

Also Read: A Simple C++ Program with Explanation

C++ is a widely used programming language known for its versatility and power.

For beginners who are just starting their programming journey, learning the basics of C++ is essential.

So, let’s dive in and discover the best 5 basic C++ programs for beginners!

1. Hello World Program

The “Hello World” program is the traditional starting point for any programming language.

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It is a simple program that prints the phrase “Hello, World!” on the screen. Here’s the code for the Hello World program in C++:

#include <iostream>

int main() {
  std::cout << "Hello, World!" << std::endl;
  return 0;
}

In this program, we include the iostream library, which allows us to use the std::cout object to display output on the screen.

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The main() function is the entry point of the program, and the std::endl manipulator is used to insert a newline character after the output.

2. Sum of Two Numbers

Calculating the sum of two numbers is a fundamental operation in programming.

Here’s a C++ program that takes two numbers as input from the user and calculates their sum:

#include <iostream>

int main() {
  int num1, num2;
  
  std::cout << "Enter the first number: ";
  std::cin >> num1;
  
  std::cout << "Enter the second number: ";
  std::cin >> num2;
  
  int sum = num1 + num2;
  
  std::cout << "The sum of " << num1 << " and " << num2 << " is: " << sum << std::endl;
  
  return 0;
}

In this program, we declare two integer variables num1 and num2 to store the user input. We use the std::cin object to read the input from the user.

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The sum of the two numbers is calculated and displayed using the std::cout object.

3. Factorial of a Number

Calculating the factorial of a number is another common programming task.

The factorial of a number is the product of all positive integers less than or equal to that number.

Here’s a C++ program that calculates the factorial of a given number:

#include <iostream>

int main() {
  int num;
  
  std::cout << "Enter a number: ";
  std::cin >> num;
  
  int factorial = 1;
  
  for (int i = 1; i <= num; i++) {
    factorial *= i;
  }
  
  std::cout << "The factorial of " << num << " is: " << factorial << std::endl;
  
  return 0;
}

In this program, we prompt the user to enter a number and store it in the num variable.

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We initialize the factorial variable to 1 and then use a for loop to calculate the factorial by multiplying the numbers from 1 to the given number.

4. Fibonacci Series

The Fibonacci series is a sequence of numbers in which each number is the sum of the two preceding ones.

Here’s a C++ program that generates the Fibonacci series up to a given limit:

#include <iostream>

int main() {
  int limit;
  
  std::cout << "Enter the limit: ";
  std::cin >> limit;
  
  int num1 = 0, num2 = 1;
  
  std::cout << "Fibonacci Series: " << num1 << " " << num2 << " ";
  
  for (int i = 2; i < limit; i++) {
    int nextNum = num1 + num2;
    std::cout << nextNum << " ";
    num1 = num2;
    num2 = nextNum;
  }
  
  std::cout << std::endl;
  
  return 0;
}

In this program, we prompt the user to enter a limit for the Fibonacci series and store it in the limit variable.

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We initialize two variables num1 and num2 to 0 and 1, respectively, which are the first two numbers of the series.

We then use a for loop to generate the next numbers of the series and display them.

5. Check Prime Number

Checking whether a number is prime or not is a common problem in programming.

A prime number is a number greater than 1 that has no divisors other than 1 and itself. Here’s a C++ program that checks whether a given number is prime or not:

#include <iostream>

bool isPrime(int num) {
  if (num <= 1) {
    return false;
  }
  
  for (int i = 2; i * i <= num; i++) {
    if (num % i == 0) {
      return false;
    }
  }
  
  return true;
}

int main() {
  int num;
  
  std::cout << "Enter a number: ";
  std::cin >> num;
  
  if (isPrime(num)) {
    std::cout << num << " is a prime number." << std::endl;
  } else {
    std::cout << num << " is not a prime number." << std::endl;
  }
  
  return 0;
}

In this program, we define a function isPrime() that takes a number as input and checks whether it is prime or not using a for loop.

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We prompt the user to enter a number and call the isPrime() function to determine if it is prime or not.

Frequently Asked Questions (FAQs)

Q1: What are the best basic C++ programs for beginners?

The best 5 basic C++ programs for beginners include the “Hello World” program, sum of two numbers, factorial of a number, Fibonacci series, and checking prime numbers.

Q2: Why is the “Hello World” program important for beginners?

The “Hello World” program is important for beginners as it introduces them to the basic syntax and structure of a programming language. It helps in understanding how to print output on the screen and serves as the first step towards learning any programming language.

Q3: How do I calculate the factorial of a number in C++?

To calculate the factorial of a number in C++, you can use a for loop to multiply the numbers from 1 to the given number. Initialize a variable with 1 and multiply it with each number in the loop.

Q4: What is the Fibonacci series in C++?

The Fibonacci series is a sequence of numbers in which each number is the sum of the two preceding ones. In C++, you can generate the Fibonacci series using a for loop, starting with the first two numbers 0 and 1, and adding the previous two numbers to get the next number.

Q5: How can I check if a number is prime in C++?

You can check if a number is prime in C++ by iterating from 2 to the square root of the number and checking if it is divisible by any of the numbers in that range. If it is divisible by any number, it is not prime; otherwise, it is prime.

Q6: Can you recommend some additional resources for learning C++?

Absolutely! Here are some additional resources for learning C++:
cplusplus.com: This website provides comprehensive documentation and tutorials on C++.
learncpp.com: LearnCpp.com offers a free and extensive online C++ tutorial.
cplusplusprogramming.com: This website provides C++ tutorials, examples, and quizzes to enhance your understanding.

Conclusion

Learning the basics of C++ is an important step for beginners in their programming journey.

In this article, we have explored the best 5 basic C++ programs that beginners can learn to build a solid foundation in the language.

Also Read: The Pointer to Understanding: Exploring the ‘this’ Pointer in C++

By implementing these programs and understanding the concepts behind them, beginners can enhance their knowledge and gain confidence in C++ programming.

Remember to practice and explore further to expand your programming skills. Happy coding!

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