**Binary Number to Decimal using functions**

**Binary Number to Decimal using functions**

Write a C++ Program to Convert Binary Number to Decimal using functions. Here’s simple C++ Program to Convert Binary Number to Decimal using functions in C++ Programming Language.

*What are Functions ?*

*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 : :**

**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 Binary Number to Decimal using functions which is successfully compiled and run on Windows System to produce desired output as shown below :

**SOURCE CODE : :**

**SOURCE CODE : :**

/* C++ Program to Convert Binary Number to Decimal using functions */ #include <iostream> #include <cmath> using namespace std; int convertBinaryToDecimal(long long); int main() { long long n; cout << "\nEnter any binary number :: "; cin >> n; cout <<"\n [ " << n << " ] in binary = [ " << convertBinaryToDecimal(n) << " ] in decimal"<< endl ; return 0; } int convertBinaryToDecimal(long long n) { int decimalNumber = 0, i = 0, remainder; while (n!=0) { remainder = n%10; n /= 10; decimalNumber += remainder*pow(2,i); ++i; } return decimalNumber; }

**OUTPUT : :**

**OUTPUT : :**

/* C++ Program to Convert Binary Number to Decimal using functions */ Enter any binary number :: 111111 [ 111111 ] in binary = [ 63 ] in decimal Process returned 0

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

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