01 #include <stdio.h>
02 
03 int main()
04 {
05     int hexadecimal[1000],dec = 0;
06 
07     long int binary;
08 
09     int i=1,j,rem;
10 
11     printf("Enter a Binary Number : ");
12     scanf("%ld",&binary);
13 
14     /*binary to decimal*/
15 
16     while(binary>0)
17         {
18             rem = binary % 2;
19             dec = dec + (rem*i);
20             binary = binary / 10;
21             i=i*2;
22         }
23 
24     /* now decimal to hexadecimal*/
25 
26     i = 0;
27 
28     while(dec!=0)
29         {
30             hexadecimal[i] = dec % 16;
31             dec = dec/16;
32             i++;
33         }
34 
35     printf("HexaDecimal value : ");
36 
37     for(j=i-1; j>=0; j--)
38         {
39             if(hexadecimal[j]>9)
40                 printf("%c",hexadecimal[j]+55);
41             else
42                 printf("%d",hexadecimal[j]);
43         }
44 
45     return 0;
46 }

 
 OUTPUT :
 
 Enter a Binary Number : 101010
 HexaDecimal value : 2A