# C++ program to convert decimal to hexadecimal

## Convert Decimal to Hexadecimal program in C++

A decimal number is taken as input and converted it into its hexadecimal equivalent.

Example:

Decimal number: 77

Decimal number: 50

### Algorithm:

1. Prompt the user to input a decimal number.
2. Store the number in a variable `dno`.
3. Initialize a variable `temp` to `dno`.
4. Initialize an empty list `hex` to store the hexadecimal equivalent of the decimal number.
5. Use a `while` loop to repeatedly divide `temp` by 16 and store the remainder in a variable `remainder`.
6. Convert the remainder to its hexadecimal equivalent by adding the appropriate ASCII value (either 48 for digits 0-9 or 55 for letters A-F).
7. Append the hexadecimal equivalent of the remainder to the `hex` list.
8. Divide `temp` by 16 and store the result back in `temp`.
9. Repeat this process until `temp` is 0.
10. Print the hexadecimal equivalent of the decimal number by iterating through the `hex` list in reverse order.
11. Exit the program.

Code:

``````
#include <iostream>
using namespace std;

int main() {
long int dno, temp;
char hex[100];
int j, remainder, i = 1;

cout << "Enter Decimal Number: ";
cin >> dno;
temp = dno;

while (temp != 0) {
remainder = temp % 16;
if (remainder < 10) {  // Converts integer into character
remainder = remainder + 48;
} else {
remainder = remainder + 55;
}
hex[i++] = remainder;
temp = temp / 16;
}

cout << "\nHexadecimal Number corresponding to Decimal Number: ";
for (j = i - 1; j > 0; j--) {
cout << hex[j];
}

return 0;
}

``````

Output

``````Enter Decimal Number: 255
Hexadecimal Number corresponding to Decimal Number: FF

``````