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

float float_swap(char cbuf[]) {
  union {
    char cval[4];
    float fval;
  } f_union;

  f_union.cval[3] = cbuf[0];
  f_union.cval[2] = cbuf[1];
  f_union.cval[1] = cbuf[2];
  f_union.cval[0] = cbuf[3];
  return(f_union.fval);
}

int main()
{
    float f;
    char cbuf[4];
    unsigned char *p;

    cbuf[0] = 0xff;
    cbuf[1] = 0xae;
    cbuf[2] = 0x47;
    cbuf[3] = 0xc5;
    printf("%x %x %x %x --> ", (unsigned char)cbuf[0], (unsigned char)cbuf[1],
	    (unsigned char)cbuf[2], (unsigned char)cbuf[3]);
    f = (float) float_swap(cbuf);

    p = (unsigned char *)&f;
    printf("%x %x %x %x\n", *p, *(p + 1), *(p + 2), *(p + 3));

    return 0;
}