Vivek Kumar

// C++ program to convert
// Hexadecimal number to Binary

#include <bits/stdc++.h>
using namespace std;

// function to convert
// Hexadecimal to Binary Number
void HexToBin(string hexdec)
{
	long int i = 0;

	while (hexdec[i]) {

		switch (hexdec[i]) {
		case '0':
			cout << "0000";
			break;
		case '1':
			cout << "0001";
			break;
		case '2':
			cout << "0010";
			break;
		case '3':
			cout << "0011";
			break;
		case '4':
			cout << "0100";
			break;
		case '5':
			cout << "0101";
			break;
		case '6':
			cout << "0110";
			break;
		case '7':
			cout << "0111";
			break;
		case '8':
			cout << "1000";
			break;
		case '9':
			cout << "1001";
			break;
		case 'A':
		case 'a':
			cout << "1010";
			break;
		case 'B':
		case 'b':
			cout << "1011";
			break;
		case 'C':
		case 'c':
			cout << "1100";
			break;
		case 'D':
		case 'd':
			cout << "1101";
			break;
		case 'E':
		case 'e':
			cout << "1110";
			break;
		case 'F':
		case 'f':
			cout << "1111";
			break;
		default:
			cout << "\nInvalid hexadecimal digit "
				<< hexdec[i];
		}
		i++;
	}
}

// driver code
int main()
{

	// Get the Hexadecimal number
	char hexdec[100] = "1AC5";

	// Convert HexaDecimal to Binary
	cout << "\nEquivalent Binary value is : ";
	HexToBin(hexdec);

	return 0;
}