/*****************************************************************/
/* File convert_float_to_bits.c:  asks for a floating point      */
/* input number and prints the value out in decimal, hex and     */
/* bits spaced for readability.  The program expects that input  */
/* floats are stored in IEEE 754 format after scanning, and is   */
/* currently built to run on little endian machines (i.e. Compaq,*/
/* Intel, etc.).  To run this program on a big endian machine,   */
/* the bit structures would require top-to-bottom inversions.    */
/*****************************************************************/

#include <stdio.h>


int main(int argc, char * argv[])
{

union float_32{
        float   floating_value_in_32_bits;
        int     floating_value_as_int;
        struct  sign_exp_mantissa{
                unsigned  mantissa:23;
                unsigned  exponent:8;
                unsigned      sign:1;
        } f_bits;
	struct single_bits{
		unsigned  b0 :1;
		unsigned  b1 :1;
		unsigned  b2 :1;
		unsigned  b3 :1;
		unsigned  b4 :1;
		unsigned  b5 :1;
		unsigned  b6 :1;
		unsigned  b7 :1;
		unsigned  b8 :1;
		unsigned  b9 :1;
		unsigned  b10:1;
		unsigned  b11:1;
		unsigned  b12:1;
		unsigned  b13:1;
		unsigned  b14:1;
		unsigned  b15:1;
		unsigned  b16:1;
		unsigned  b17:1;
		unsigned  b18:1;
		unsigned  b19:1;
		unsigned  b20:1;
		unsigned  b21:1;
		unsigned  b22:1;
		unsigned  b23:1;
		unsigned  b24:1;
		unsigned  b25:1;
		unsigned  b26:1;
		unsigned  b27:1;
		unsigned  b28:1;
		unsigned  b29:1;
		unsigned  b30:1;
		unsigned  b31:1;
	}bit;
} float_32;
char bit_string[43];

int i,j,k;

for(i=0; i<42; i++){
	bit_string[i] = ' ';
}
bit_string[42] = '\0';

printf("please enter a floating point number and new-line: ");
scanf("%g", &float_32.floating_value_in_32_bits);

bit_string[0] = float_32.bit.b31?'1':'0';

bit_string[2] = float_32.bit.b30?'1':'0';
bit_string[3] = float_32.bit.b29?'1':'0';
bit_string[4] = float_32.bit.b28?'1':'0';
bit_string[5] = float_32.bit.b27?'1':'0';

bit_string[7] = float_32.bit.b26?'1':'0';
bit_string[8] = float_32.bit.b25?'1':'0';
bit_string[9] = float_32.bit.b24?'1':'0';
bit_string[10] = float_32.bit.b23?'1':'0';

bit_string[12] = float_32.bit.b22?'1':'0';
bit_string[13] = float_32.bit.b21?'1':'0';
bit_string[14] = float_32.bit.b20?'1':'0';

bit_string[16] = float_32.bit.b19?'1':'0';
bit_string[17] = float_32.bit.b18?'1':'0';
bit_string[18] = float_32.bit.b17?'1':'0';
bit_string[19] = float_32.bit.b16?'1':'0';

bit_string[21] = float_32.bit.b15?'1':'0';
bit_string[22] = float_32.bit.b14?'1':'0';
bit_string[23] = float_32.bit.b13?'1':'0';
bit_string[24] = float_32.bit.b12?'1':'0';

bit_string[26] = float_32.bit.b11?'1':'0';
bit_string[27] = float_32.bit.b10?'1':'0';
bit_string[28] = float_32.bit.b9?'1':'0';
bit_string[29] = float_32.bit.b8?'1':'0';

bit_string[31] = float_32.bit.b7?'1':'0';
bit_string[32] = float_32.bit.b6?'1':'0';
bit_string[33] = float_32.bit.b5?'1':'0';
bit_string[34] = float_32.bit.b4?'1':'0';

bit_string[36] = float_32.bit.b3?'1':'0';
bit_string[37] = float_32.bit.b2?'1':'0';
bit_string[38] = float_32.bit.b1?'1':'0';
bit_string[39] = float_32.bit.b0?'1':'0';



printf("\n\nthe base 10 float result is:     %-15.9g", float_32.floating_value_in_32_bits);
printf("\n\nthe base 10 int   result is:%15d\n\n", float_32.floating_value_as_int);

printf("      components in hex are:     0x%08x\n\n", float_32.floating_value_as_int);

printf("   components in binary are:     %s\n", bit_string);
}