Takes a floating point number and show its binary representation.

ieee754.cpp

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

void printDouble(double d) {
  unsigned long long i = *(unsigned long long *) &d;

  for(int j = 63; j >= 0; j--) {
    cout << ((i >> j) & 1);

    if(j == 63) cout << " ";
    else if(j == 52) cout << " ";
  }

  cout << endl;
}

int main() {
  cout << "Give me a floating point number and I'll show you its binary representation." << endl;

  double d = 0;
  scanf("%lf", &d);

  printDouble(d);
  return 1;
}