binary to hexadecimal conversion in c language | CTechnotips

Binary to hexadecimal conversion method

Step1: Arrange the binary number in the group 4 from right side.

Step 2:  Replace the each group with following values:

Binary number	Hexadecimal values
0000	0
0001	1
0010	2
0011	3
0100	4
0101	5
0110	6
0111	7
1000	8
1001	9
1010	A
1011	B
1100	C
1101	D
1110	E
1111	F

Binary to hexadecimal chart

Binary to hexadecimal conversion examples:

For example we want to convert binary number 11011010101001101 to hexadecimal.

Step 1: 0001 1011 0101 0100 1101

Step 2:  1     B    5    4   D

So (1011010101001101)₂ = (1B54D)₁₆

C program for hexadecimal to binary conversion

#include<stdio.h>

int main(){

   

    long int binaryNumber,hexadecimalNumber=0,j=1,remainder;

   

    printf("Enter any number any binary number: ");

    scanf("%ld",&binaryNumber);

   

    while(binaryNumber!=0){

    remainder=binaryNumber%10;

    hexadecimalNumber=hexadecimalNumber+remainder*j;

        j=j*2;

        binaryNumber=binaryNumber/10;

      }

   

    printf("Equivalent hexadecimal value: %lX",hexadecimalNumber);

    return 0;

}

Sample output:

Enter any number any binary number: 1101

Equivalent hexadecimal value: D

How to convert large binary number to hexadecimal

#include<stdio.h>

#define MAX 1000

int main(){

   char binaryNumber[MAX],hexaDecimal[MAX];

   int temp;

   long int i=0,j=0;

  

   printf("Enter any number any binary number: ");

   scanf("%s",binaryNumber);

   while(binaryNumber[i]){

      binaryNumber[i] = binaryNumber[i] -48;

      ++i;

   }

   --i;

   while(i-2>=0){

       temp =  binaryNumber[i-3] *8 + binaryNumber[i-2] *4 +  binaryNumber[i-1] *2 + binaryNumber[i] ;

       if(temp > 9)

            hexaDecimal[j++] = temp + 55;

       else

            hexaDecimal[j++] = temp + 48;

       i=i-4;

   }

   if(i ==1)

      hexaDecimal[j] = binaryNumber[i-1] *2 + binaryNumber[i] + 48 ;

   else if(i==0)

      hexaDecimal[j] =  binaryNumber[i] + 48 ;

    else

      --j;

   printf("Equivalent hexadecimal value: ");

   while(j>=0){

      printf("%c",hexaDecimal[j--]);

   }

   return 0;

}

Sample output:

Enter any number any binary number: 1010011011100011110

001001111011110001000100011101110111011110

Equivalent hexadecimal value: 14DC789EF111DDDE