C program to convert hexadecimal number to binary number.

source code

#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);

getch();

 return 0;

}