tool provided to display the binary representation of float and double in C

display_float_double.c

#include <stdio.h>
#include <string.h>

void print_float_header()
{
    printf("%d\n%-10s|%-s|%-8s|%-23s|\n", sizeof(float), "float", "S", "E", "M");
}
void print_float(float f)
{
    char data[sizeof(f)];
    int i = sizeof(f) * 8;
    memcpy(data, &f, sizeof(f));
    printf("% lf |", f);
    while (i--)
        printf("%c%s",
                      (data[i / 8] & 1 << (i % 8)) ? '1' : '0', ((
                          (i == sizeof(f) * 8 - 1)
                        ||
                          (i == sizeof(f) * 8 - 9)
                        ||
                          (i == 0)) ? "|"
                                    : ""));
    putchar('\n');
}
void print_double_header()
{
    printf("%d\n%-10s|%-s|%-11s|%-52s|\n", sizeof(float), "double", "S", "E", "M");
}
void print_double(double f)
{
    char data[sizeof(f)];
    int i = sizeof(f) * 8;
    memcpy(data, &f, sizeof(f));
    printf("% lf |", f);
    while (i--)
        printf("%c%s",
                      (data[i / 8] & 1 << (i % 8)) ? '1' : '0', ((
                          (i == sizeof(f) * 8 - 1)
                        ||
                          (i == sizeof(f) * 8 - 12)
                        ||
                          (i == 0)) ? "|"
                                    : ""));
    putchar('\n');
}

int main()
{
    print_float_header();
    print_float(0.0f);
    print_float(-0.0f);
    print_float(6.f);
    print_double_header();
    print_double(0.0);
    print_double(-0.0);
    print_double(5);
    return 0;
}