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C++ > Conversions Code Examples

Simple C++ program to convert binary decimal number

Simple C++ program to convert binary decimal number

    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

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.

    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

#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;

}

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