#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main (void) {

float vissza;
float fl;//, fl2;
fl = -2.34f;
int *iptr = (int * )&fl;
int fract = (*iptr >> 0) & 0x7FFFFF;
int exp   = (*iptr >> 23) & 0xFF;
int sign  = (*iptr >> 31) & 0x1;
printf("fract=%d, exp=%d, sign=%d\n", fract, exp, sign);

int i = 1;

while (1<= (fract / pow(10, i))) i++;

printf("0.something=%f\n", pow(10, -i)*fract);

vissza = (sign == 0 ? 1 : -1) * ((pow(10, -i)*fract+1) * pow(2,((int)exp-127)));

printf("float=%f\n", vissza);

return 0;
}