This is a Number Base Conversion Program written in C. It is designed to assist novice C programmers in understanding and implementing basic number base conversions of numeral system. This program allows users to perform the following conversions:

1. Decimal to Binary: Converts a decimal number to its binary equivalent.
2. Decimal to Octal: Converts a decimal number to its octal equivalent.
3. Octal to Decimal: Converts an octal number to its decimal equivalent.
4. Octal to Binary: Converts an octal number to its binary equivalent.
5. Binary to Decimal: Converts a binary number to its decimal equivalent.
6. Binary to Octal: Converts a binary number to its octal equivalent.

New C programmers can use this program as a reference to grasp fundamental concepts of number base conversions and modular programming in the C language.

This program utilizes several features of the C programming language to achieve its functionality. Here are some of the key C features used in the program. It also uses functions from the `math.h` library for mathematical operations.

1. Functions: The program uses functions to encapsulate specific conversion tasks. Functions such as `binaryToDecimal`, `decimalToBinary`, `octalToDecimal`, `decimalToOctal`, `octalToBinary`, and `binaryToOctal` are defined to perform individual conversion operations. This modular approach enhances code readability and maintainability.
2. Switch Statement: The program employs a `switch` statement to provide a menu-driven interface. The user can select the desired conversion option by entering a corresponding menu number. The `switch` statement directs the program flow based on the user’s choice.
3. Loops (while, for): The program utilizes `while` loops in the `decimalToBinary`, `decimalToOctal`, `octalToBinary`, and `binaryToOctal` functions for iterative processes. Additionally, a `for` loop is used in the `binaryToDecimal` and `octalToDecimal` functions to iterate through the input string.
4. Arrays (Strings): The program makes use of character arrays (strings) to store binary, octal, and decimal representations. Arrays like `input`, `binaryOutput`, `octalOutput`, `binaryOutputOctal`, and `octalOutputBinary` are employed to store user input and conversion results.
5. Standard Input/Output: The program relies on standard input/output functions (`printf` and `scanf`) for user interaction. It prompts users for input and displays conversion results through the console.
6. Math Library (pow function): The program uses the `pow` function from the math library to perform power calculations. This is employed in the `binaryToDecimal` and `octalToDecimal` functions to calculate the decimal equivalent of binary and octal numbers.
7. Conditional Statements: The program includes conditional statements (`if`) to check for specific conditions, such as determining whether a binary digit is ‘1’ in the `binaryToDecimal` function.