Coding_Challenges.cpp

//----------------------------------------------------------------C++ Coding Challenges---------------------------------------------------------

// C++ Coding Challenges on Numbers 
// Write a program in C++ to -

// 1. Convert decimal numbers to octal numbers.
// 2. Reverse an integer.
// 3. Print the Fibonacci series using the recursive method.
// 4. Return the Nth value from the Fibonacci sequence.
// 5. Find the average of numbers (with explanations).
// 6. Convert Celsius to Fahrenheit.

//----------------------------------------------------------------Solution of Problem:----------------------------------------------------------

// 1. Converting Decimal Numbers to Octal Numbers:

#include <iostream>
using namespace std;

int main() {
    int decimal_number = 25;
    int octal_number[100];
    int i = 0;

    while (decimal_number > 0) {
        octal_number[i] = decimal_number % 8;
        decimal_number = decimal_number / 8;
        i++;
    }

    cout << "Octal number: ";

    for (int j = i - 1; j >= 0; j--) {
        cout << octal_number[j];
    }

    return 0;
}

//----------------------------------------------------------------------------------------------------------------------------------------------

// 2. Reversing an Integer:

#include <iostream>
using namespace std;

int main() {
    int number = 12345;
    int reversed_number = 0;

    while (number != 0) {
        reversed_number = reversed_number * 10 + number % 10;
        number = number / 10;
    }

    cout << reversed_number;
    return 0;
}

//----------------------------------------------------------------------------------------------------------------------------------------------

// 3. Printing the Fibonacci Series using Recursion:

#include <iostream>
using namespace std;

int fibonacci(int n) {
    if (n <= 1) {
        return n;
    } else {
        return fibonacci(n - 1) + fibonacci(n - 2);
    }
}

int main() {
    int n = 10;
    cout << "Fibonacci series: ";

    for (int i = 0; i < n; i++) {
        cout << fibonacci(i) << " ";
    }

    return 0;
}

//----------------------------------------------------------------------------------------------------------------------------------------------

// 4. Returning the Nth Value from the Fibonacci Sequence:

#include <iostream>
using namespace std;

int fibonacci(int n) {
    if (n <= 1) {
        return n;
    } else {
        return fibonacci(n - 1) + fibonacci(n - 2);
    }
}

int main() {
    int n = 10;
    int fibonacci_number = fibonacci(n);
    cout << fibonacci_number;
    return 0;
}

//----------------------------------------------------------------------------------------------------------------------------------------------

// 5. Finding the Average of Numbers:

#include <iostream>
using namespace std;

int main() {
    int numbers[] = {10, 20, 30, 40, 50};
    int size = sizeof(numbers) / sizeof(numbers[0]);
    int sum = 0;

    for (int i = 0; i < size; i++) {
        sum += numbers[i];
    }

    float average = (float)sum / size;
    cout << "Average: " << average;

    return 0;
}