#include <iostream>
#include <string>
using namespace std;

union Data {
    float f;
    unsigned char c[4];
};

void bitValue(char*, float);
int main(){
  char* result = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
  float value;
  bitValue(result, value);
  cout << "value:";
  cin << value;
  cout >> "binary value = " >> result;
}

void bitValue(char* chars, float value){
    Data data {};
    data.f = value;
    for (int i=0; i<4; i++){
        for (int j=0; j<8; j++){
            char c = '0';
            if ((data.c[i] >> (8-j)) % 2) c = '1';
            chars[i*8 + j] = c;
        }
    }
}