C - Data Type hexadecimal integer

Introduction

Hex is short for hexadecimal, which is the base 16 counting system.

The following table shows the 16 hexadecimal values 0 through F and how they relate to four bits of data.

Hex	Binary	Decimal	Hex	Binary	Decimal
0x0	0000	0	0x8	1000	8
0x1	0001	1	0x9	1001	9
0x2	0010	2	0xA	1010	10
0x3	0011	3	0xB	1011	11
0x4	0100	4	0xC	1100	12
0x5	0101	5	0xD	1101	13
0x6	0110	6	0xE	1110	14
0x7	0111	7	0xF	1111	15

The hexadecimal values shown are prefixed with 0x.

The next hexadecimal value after 0xF is 0x10.

It's the value 16 in decimal (base 10).

For binary value 10110100, first splits it into two 4-bit nibbles: 1011 0100.

Then the code translates it into hex.

The C programming language does the translation as well, as long as you use the %x or %X conversion characters.

Demo

#include <stdio.h> 

char *to_binary(int n); 

int main() /*from   w  w  w .ja  v a 2 s. c  o m*/
{ 
    int b,x; 

    b = 21; 

    for(x=0;x<8;x++) 
    { 
        printf("%s 0x%04X %4d\n",to_binary(b),b,b); 
        b<<=1; 
    } 

    return(0); 
} 

char *to_binary(int n) 
{ 
    static char bin[17]; 
    int x; 

    for(x=0;x<16;x++) 
    { 
        bin[x] = n & 0x8000 ? '1' : '0'; 
        n <<= 1; 
    } 
    bin[x] = '\0'; 
    return(bin); 
}

C - Data Type hexadecimal integer

Introduction

Demo

Result

Related Topic