C++ Program For Octal To Decimal Conversion

In this article, we will discuss the C++ program for octal to decimal conversion with its explanation.

Program:

Here's a simple C++ program to convert an octal number to its decimal equivalent:

Output:

Explanation:

1. Include Header Files:

• #include <iostream>: This line includes the header file for the input/output stream, which is required to operate on input and output.
• #include <cmath>: This line includes the cmath header file, which is required to compute powers with the pow function.

2. namespace:

• As this line declares, the program will use the std namespace. The standard C++ library is contained in the std namespace.

3. Function for Octal to Decimal Conversion:

• An octal number is passed to the octalToDecimal function, which returns its decimal equivalent.
• It iterates through each digit of the octal number using a while loop.
• The modulo operator (%) is used inside the loop to calculate the remaining digit.
• The decimal equivalent is updated by multiplying the remainder by 8, raised to the power of i (the digit's position).
• Until the octal number drops to zero, the loop is repeated.

4. Main Function:

• The program's entry point serves as the primary function.
• It declares a variable called octalNumber to store the octal number the user enters.
• Using cout and cin, the user is asked to enter an octal number.
• The user-inputted octal number is passed as an argument to the octalToDecimal function, and the outcome is saved in the decimalNumber
• After that, the user is shown the decimal equivalent via cout.

5. Return Statement:

The main function returns 0, indicating successful execution to the operating system.