/************************************************************
 Program to convert a decimal number to a hexadecimal number
 ************************************************************/

#include<stdio.h> // include stdio.h library

int main(void)
{   
    int num, bin = 0;    
    int i = 0, rem;
    char hex_arr[50];

    printf("Enter a decimal number: \n");
    scanf("%d", &num);      

    while(num != 0)
    {
        rem = num % 16;  // get the right most digit

        if (rem < 10)
        {
            hex_arr[i++] = 48 + rem;
        }
        else
        {
            hex_arr[i++] = 55 + rem;
        }

        num /= 16;  // get the quotient
    }

    printf("0x");

    for(int j = i - 1; j >= 0 ; j--)  // print the hex_arr in reverse order
    {
        printf("%c", hex_arr[j]);
    }    

    return 0; // return 0 to operating system
}