#!/usr/local/bin/tcc -run
// http://www.geocities.co.jp/SiliconValley-Bay/7437/c/unsigned.html
#include <stdio.h>
#include <stdlib.h>

int main (int argc, char *argv[]) {
    union { float f; int i; } target;
    int i, j, sign, exponent, tmp_mantissa, tmp, tmp2;
    double mantissa;
    target.f = atof(argv[1]);

    printf("float target = %f\n", target.f);
    for (i = 31; i >= 0; i--) {
        printf( "%d", ( target.i >> i ) & 1 );
    }
    printf("\n");

    sign = ( target.i >> 31 ) & 1;
    exponent = (( target.i >> 23 ) & 0xff) - 0x7f;
    tmp_mantissa = (target.i & 0x7ffFFF) << 9;

    mantissa = 0;
    tmp2 = 1;
    for (i = 31; i >= 9; i--) {
        tmp2 = tmp2 * 2;
        tmp = ( tmp_mantissa >> i ) & 1;
        mantissa = mantissa + (double)tmp / (double)tmp2;
    }

    printf("sign : %d\n", sign);
    printf("exponent : %d\n", exponent);
    printf("mantissa : %f\n", mantissa);

    return 0;
}