/* C++ Program - Binary to Hexadecimal */	
#include<iostream.h>
#include<conio.h>
void main()
{
	clrscr();
	long int binnum, rem, quot;
	int i=1, j, temp;
	char hexdecnum[100];
	cout<<"Enter Binary Number : ";
	cin>>binnum;
	quot = binnum;
	while(quot!=0)
	{
		temp = quot % 16;
		// To convert integer into character
		if( temp < 10)
		{
			temp = temp + 48;
		}
		else
		{
			temp = temp + 55;
		}
		hexdecnum[i++]= temp;
		quot = quot / 16;
	}
	cout<<"Equivalent hexadecimal value of "<<binnum<<" is :\n";
	for(j=i-1 ;j>0;j--)
	{
		cout<<hexdecnum[j];
	}
	getch();
}

Output
Enter Binary Number :1101
Equivalent hexadecimal value of 1101 is:
44D