Decimal - Binary

[js2006]

how can we write a program that takes a decimal number input from the user and displays its binary number equivalent in 12 bits on the screen in the c++.

Output

Enter a decimal number: 32
Its Binary Equivalent is :   000000100000

[js2006]

Java script for Decimal to Binary:

x = 75 ;	// x is the decimal number
y = “” ;	// y is the binary equivalent
while ( x > 0) {
	remainder = x % 2 ;
	quotient = Math.floor( x / 2 ) ;
	y = remainder + y ;
	x = quotient ;
}
document.write(“y = ” + y) ;

how could i do in C++ with displays its binary number equivalent in 12 bits on the screen in the c++

[toe_cutter]

void printBin( long long var ) {
  int i;

  for (i=11; i>=0; i--)
    printf("%d", (var >> i) & 1);
  putchar('\n');
}

Opps this is in C, but should work similar in c++.

[js2006]

done something with it ,

but i need improvement and like to see my prog working with above output i mean 12 bits on screen. how to do it ?

Like to see C++ code plz

#include <iostream>
using namespace std;

int main() {
    int n;  // number to convert to binary

    while (cin >> n) {
        if (n > 0) {
            cout << n << " (decimal) = ";
    
            while (n > 0) {
                cout << n%2;
                n = n/2;
            }
    
            cout << " (binary) in reverse order" << endl;
        } else {
            cout << "Please enter a number greater than zero." << endl;
        }
    }
  return 0;
}//end main

[toe_cutter]

My code works fine for c++. You just need to include library stdio.h.

#include <stdio.h>
#include <iostream>
using namespace std;

void printBin( int var ) {
  int i;

  for (i=11; i>=0; i--)
    printf("%d", (var >> i) & 1);
  putchar('\n');
}

int main() {
  int n;  // number to convert to binary

    while (cin >> n) {
        if (n > 0) {
            cout << n << " (decimal) = ";
            printBin(n);
            cout << " (binary) in reverse order" << endl;
        } else {
            cout << "Please enter a number greater than zero." << endl;
        }
    }
  return 0;
}

[redhead]

You just need to include library stdio.h.

Or change printBin() to:

void printBin( int var ) {
  int i;
  for (i=11; i>=0; i--)
    cout << ((var >> i) & 1);
  cout << endl;
}

[toe_cutter]

Originally Posted by redhead

Or change printBin() to:

void printBin( int var ) {
  int i;
  for (i=11; i>=0; i--)
    cout << ((var >> i) & 1);
  cout << endl;
}

Good call. I've been programming in C for so long now I have forgotten a bunch of c++ stuff.