C++ Program to Convert Octal to Binary using function

What are Functions ?

Function is a block of statements that performs some operations. All C++ programs have at least one function – function called “main()”. This function is entry-point of your program.

A function declaration tells the compiler about a function’s name, return type, and parameters. A function definition provides the actual body of the function.

Defining a Function : :

The general form of a C++ function definition is as follows:

return_type Function_Name( list of parameters )
{
//function’s body
}

• return_type : suggests what the function will return. It can be void, int, char, some pointer or even a class object.
• Function_Name : is the name of the function, using the function name it is called.
• Parameters : are variables to hold values of arguments passed while function is called. A function may or may not contain parameter list.
• Function body : is he part where the code statements are written.

Below is the source code for C++ Program to Convert Octal to Binary using function which is successfully compiled and run on Windows System to produce desired output as shown below :

SOURCE CODE : :

/*  C++ Program to Convert Octal to Binary using function  */

#include <iostream>
#include <cmath>
using namespace std;

long long convertOctalToBinary(int);
int main()
{
    int octalNumber;

    cout << "Enter any octal number :: ";
    cin >> octalNumber;

    cout <<"\n [ " << octalNumber << " ] in octal = [ " << convertOctalToBinary(octalNumber) << " ] in binary.\n";

    return 0;
}

long long convertOctalToBinary(int octalNumber)
{
    int decimalNumber = 0, i = 0;
    long long binaryNumber = 0;

    while(octalNumber != 0)
    {
        decimalNumber += (octalNumber%10) * pow(8,i);
        ++i;
        octalNumber/=10;
    }

    i = 1;

    while (decimalNumber != 0)
    {
        binaryNumber += (decimalNumber % 2) * i;
        decimalNumber /= 2;
        i *= 10;
    }

    return binaryNumber;
}

OUTPUT : :

/*  C++ Program to Convert Octal to Binary using function  */

Enter any octal number :: 100

 [ 100 ] in octal = [ 1000000 ] in binary.

Process returned 0

Above is the source code for C++ Program to Convert Octal to Binary using function which is successfully compiled and run on Windows System.The Output of the program is shown above .