**Convert Binary-Hexadecimal program**

**Binary Number:** A binary number is a number expressed in the base-2 binary numeral system, using only two symbols: which are 0 (zero) and 1 (one).

**HexaDecimal Number:** A hexadecimal number is a positional numeral system with base 16 and uses sixteen distinct symbols (0 to 15).

**Example:**

Binary number: 10110

Equivalent Hexadecimal Number: 16

Binary number: 101010

Equivalent Hexadecimal Number: 2A

**# Algorithm**

- Take a binary number as input.
- Group all binary bits to 4 digits (starting from the right side).
- Write the corresponding hexadecimal value of each grouped digit.

**Code:**

```
#include <iostream>
using namespace std;
int main()
{
char bno[1000], hex[1000];
int temp;
long int i = 0, j = 0;
cout << "Enter Binary Number : ";
cin >> bno;
while (bno[i])
{
bno[i] = bno[i] - 48;
++i;
}
--i;
while (i - 2 >= 0)
{
temp = bno[i - 3] *8 + bno[i - 2] *4 + bno[i - 1] *2 + bno[i];
if (temp > 9)
hex[j++] = temp + 55;
else
hex[j++] = temp + 48;
i = i - 4;
}
if (i == 1)
hex[j] = bno[i - 1] *2 + bno[i] + 48;
else if (i == 0)
hex[j] = bno[i] + 48;
else
--j;
cout << "\nHexadecimal Number equivalent to Binary Number : ";
while (j >= 0)
{
cout << hex[j--];
}
return 0;
}
```

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