Question

C programming assignment.

instructions are given below and please edit this code only.

also include screenshot of the output

//In this assignment, we write code to convert decimal integers into hexadecimal numbers
//We pratice using arrays in this assignment
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

//convert the decimal integer d to hexadecimal, the result is stored in hex[]
void dec_hex(int d, char hex[])
{
   char digits[] ={'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B',
                   'C', 'D', 'E', 'F'};

   int k = 0;
   //Fill in your code below
   //It should not be hard to obtain the last digit of a hex number
   //Then what?
   //If we are getting the digits in a reverse order, what should we do in the end?
  

   //Make sure the last character is a zero so that we can print the string correctly
   hex[k] = '\0';
}

// Do not change the code below
int main()
{
   int d;
   char hex[80];
  
   printf("Enter a positive integer : ");
   scanf("%d", &d);
   dec_hex(d, hex);
   printf("%s\n", hex);
   return 0;
}

Answer 1

If you have any doubts, please give me comment...

//In this assignment, we write code to convert decimal integers into hexadecimal numbers

//We pratice using arrays in this assignment

#include <stdio.h>

#include <stdlib.h>

#include <assert.h>

//convert the decimal integer d to hexadecimal, the result is stored in hex[]

void dec_hex(int d, char hex[])

{

    char digits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B','C', 'D', 'E', 'F'};

    int k = 0;

    while(d>0){

        int rem = d%16;

        hex[k] = digits[rem];

        d = d/16;

        k++;

    }

    //reversing

    int i=0;

    while(i<k/2){

        char t = hex[i];

        hex[i] = hex[k-i-1];

        hex[k-i-1] = t;

        i++;

    }

    hex[k] = '\0';

}

// Do not change the code below

int main()

{

    int d;

    char hex[80];

    printf("Enter a positive integer : ");

    scanf("%d", &d);

    dec_hex(d, hex);

    printf("%s\n", hex);

    return 0;

}