#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <locale.h>

int main() {

    float f;

    double d;

    char bs[];

    char b[];

    char s[];

    unsigned char *p;

    char e[];

    char *t;

    int ex;

    while () {

        printf("Input a float point number:"); fflush(stdout);

        rewind(stdin);

        fgets(s, , stdin);

        if ( == sscanf(s, "%f", &f) &&  == sscanf(s, "%lf", &d)) break;

    }

    printf("f=%g\n", f);

    p = (unsigned char *)&f;

    printf("hex=%02X %02X %02X %02X\n", p[], p[], p[], p[]);

    ltoa(*(long *)&f, b, );

    sprintf(bs, "%032s", b);

    printf("bin=%s\n", bs);

    printf("bin=%.1s %.8s   %s\n", bs, bs + , bs + );

    strncpy(e, bs + , ); e[] = ;

    ex = strtol(e, &t, );

    printf("    %c %-4d-127 1.%s\n", (bs[] == '') ? '+' : '-', ex, bs + );

    ex -= ;

    printf("    %c %-8d 1.%s\n", (bs[] == '') ? '+' : '-', ex, bs + );

    printf("\nd=%lg\n", d);

    p = (unsigned char *)&d;

    printf("hex=%02X %02X %02X %02X %02X %02X %02X %02X\n", p[], p[], p[], p[], p[], p[], p[], p[]);

    _i64toa(*(__int64 *)&d, b, );

    sprintf(bs, "%064s", b);

    printf("bin=%s\n", bs);

    printf("bin=%.1s %.11s   %s\n", bs, bs + , bs + );

    strncpy(e, bs + , ); e[] = ;

    ex = strtol(e, &t, );

    printf("    %c %-6d-1023 1.%s\n", (bs[] == '') ? '+' : '-', ex, bs + );

    ex -= ;

    printf("    %c %-11d 1.%s\n", (bs[] == '') ? '+' : '-', ex, bs + );

    return ;

}

warning C4996: 'itoa': The POSIX name for this item is deprecated. Instead, use the ISO C++ conformant name: _itoa. See online help for details