My code is currently not working out like I want it to , it is supposed to split up the three components of a floating point number into the sign, exponent and fraciton part of a 32 bit int. Here is the code:
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <assert.h>
#include “floats.h”
uint32_t u;
uint32_t sign;
uint32_t exponent;
uint32_t fraction;
// separate out the 3 components of a float
float_components_t float_bits(uint32_t f) {
sign = ((f>> 31) & 0x1);
exponent = ((f >> 30) & 0x7F);
fraction = ((f >> 23) & 0xFFFFFF);
}
Floats.h
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <assert.h>
/// We use `union overlay’ to obtain the raw bits of a `float’-type
/// value, by storing the `float’ in the `f’ field and then using the
/// `u’ field to obtain the bits.
union overlay {
float f;
uint32_t u;
};
/// A struct suitable for storing the three components of a `float’.
typedef struct float_components {
uint32_t sign;
uint32_t exponent;
uint32_t fraction;
} float_components_t;
/// For the `float_bits’ exercise:
float_components_t float_bits(uint32_t bits);
int is_nan(float_components_t f);
int is_positive_infinity(float_components_t f);
int is_negative_infinity(float_components_t f);
int is_zero(float_components_t f);
/// For the `float_2048′ exercise:
uint32_t float_2048(uint32_t f);
/// For the `float_less’ exercise:
uint32_t float_less(uint32_t bits1, uint32_t bits2);
/// For the `float_print’ exercise:
void float_print(uint32_t f);
Test Float_bits
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <assert.h>
#include “floats.h”
int main(int argc, char *argv[]) {
for (int arg = 1; arg < argc; arg++) {
union overlay input;
input.f = atof(argv[arg]);
float_components_t c = float_bits(input.u);
printf(“float_bits(%.9g) returnedn”, input.f);
printf(“sign=0x%xn“, c.sign);
printf(“exponent=0x%02xn”, c.exponent);
printf(“fraction=0x%06xn”, c.fraction);
printf(“is_nan returned %dn”, is_nan(c));
printf(“is_positive_infinity returned %dn”, is_positive_infinity(c));
printf(“is_negative_infinity returned %dn”, is_negative_infinity(c));
printf(“is_zero returned %dn”, is_zero(c));
}
return 0;
}
I am really stuck and not sure what to do please any help would be much appreciated
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