**Cpp Tutorial Contains**

**Binary to Decimal Conversion Code in C++**- Program Logic Explanation
- Dry run the code with a simple input so the basic working of program can be understand easily

**Concept Used**

**Know the basic math of converting one number to other number e.g BINARY to DECIMAL**- functions
- while loop

**Problem Statement**

Write a C++ program which asks user to input a binary number then convert it into its equivalent decimal number and show the result.

To improve readability of program make a separate function and function should return the resultant number.

**C++ CODE**Compiler used:

**C++ codeBlocks Compiler**#include<iostream> using namespace std; long ConvertBinary2Decimal(unsigned long num); int main() { unsigned long binary_num, decimal = 0; cout <<"\n\tEnter a binary number to get Equivalent Decimal : "; cin >> binary_num;decimal=ConvertBinary2Decimal(binary_num);cout <<"\n\tDecimal Value Of " <<binary_num << " is = " << decimal << endl; return 0; } long ConvertBinary2Decimal(unsigned long bin_num) { unsigned long decimal = 0; int remainder=0, base = 1; while (bin_num > 0) { remainder = bin_num % 10; decimal = decimal + remainder * base; bin_num = bin_num / 10; base = base * 2; } return decimal; }

**Program Explanation**

- In main function user enters input number
- Calls the function and pass the number
- Function calculates the required result and return
- In main function program displays the final result

**Dry Run of Code**

Input = 101

--------------------------------

**Iteration = 1**

remainder = 1

decimal = 1

bin_num = 10

base = 2

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**Iteration = 2**

remainder = 0

decimal = 1

bin_num = 1

base = 4

--------------------------------

**Iteration = 3**

remainder = 1 -> as 1 mod 10 =1

**decimal = 5 -> previous value+remainder*base = 5 RESULT**

bin_num = 0

base = 8

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Main logic of the program in while loop take another input and dry run it into a notebook. Best of Luck

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