Question

Use any high-level programming language you wish for the following programming exercises. Do not call built-in library functions that accomplish these tasks automatically. (Examples are sprintf and sscanf from the Standard C library). 1. Write a program that receives an integer and must return a string containing the hexadecimal representation of that integer.

Answer 1

#include<iostream>
using namespace std;
//method to convert number to hexadecimal
string toHex(int n)
{//this is the method which converts given integer vaue to hexadecimal string and returns
   char c[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
   if(n==0)
   return "";
   return toHex(n/16)+ ""+c[n%16];//converting to hexadecimal string
}
int main()
{
   int n;
   cout<<"Enter number:";
   cin>>n;
   cout<<"Hexa decimal value:"<<toHex(n)<<endl;
   return 0;
}

output:

Enter number:27
Hexa decimal value:1B

Process exited normally.
Press any key to continue . . .