برنامه تبدیل عدد از مبنتای دو 2 به ده 10 باینری به دسیمال(binary to decimal) به زبان سی پلاس پلاس

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برنامه زیر عدد باینتری رو به دهدهی میبره و بلعکس

/* C++ programming source code to convert either binary to decimal or decimal to binary according to data entered by user. */

#include <iostream>
#include <cmath>
using namespace std;
int binary_decimal(int n);
int decimal_binary(int n);
int main()
{
   int n;
   char c;
   cout << "Instructions: " << endl;
   cout << "1. Enter alphabet 'd' to convert binary to decimal." << endl;
   cout << "2. Enter alphabet 'b' to convert decimal to binary." << endl;
   cin >> c;
   if (c =='d' || c == 'D')
   {
       cout << "Enter a binary number: ";
       cin >> n;
       cout << n << " in binary = " << binary_decimal(n) << " in decimal";
   }
   if (c =='b' || c == 'B')
   {
       cout << "Enter a binary number: ";
       cin >> n;
       cout << n << " in decimal = " << decimal_binary(n) << " in binary";
   }
   return 0;
}

int decimal_binary(int n)  /* Function to convert decimal to binary.*/
{
    int rem, i=1, binary=0;
    while (n!=0)
    {
        rem=n%2;
        n/=2;
        binary+=rem*i;
        i*=10;
    }
    return binary;
}

int binary_decimal(int n) /* Function to convert binary to decimal.*/
{
    int decimal=0, i=0, rem;
    while (n!=0)
    {
        rem = n%10;
        n/=10;
        decimal += rem*pow(2,i);
        ++i;
    }
    return decimal;
}