Binary to hexadecimal conversion in c





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


Algorithm:

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






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5 comments:

Anonymous said...

why do you minus 48?

Ritesh kumar said...

ASCII value of character '0' is 48
So, '0' - 48 = 0
In the same way '1' - 0 = 1

Frtheo77 said...

is there any way of getting a more notes on the code to better understand what it is the code is doing?

Unknown said...

nothing work provide new code


VALENTINO FARAJI said...

nothing work provide new code