Hello I have this code that for the most part it works. in part 8 of the choices from menu the outputs needs to be in hexadecimal, but I cant it to work. can someone help me get part 8 to display the values is hex.

////////////////////////////////////////////////////////////////////////////

here is the code::

//Name: Joseph Arce

//Name: Mitchell Matos

//Team 2

//Date:2/15/2021

//School: NJIt

//Project Name: Lab#5.V1.0

//

//

/// This program implement the IEEE single precision 754 floating point

// The purpose here is to promt the user for a value once they value is capture

// the user will be prompt again to selct from a menu what kind of operation

//he/she want the promgram to do with the value entered.

// This program consist of different function that perfrom on the value

// this program convert a base-10 decimal value positive or negative

// to the IEEE standard floating point(IEEE 754)

#include

#include

#include// can't be used here...

// STL

// More header files in future we save them in header files

using namespace std;// subset of

// Function prototypes

void prompt_user(double& numb);

void sign(double& numb); // this funtions uses and if-statemnt to check if the value if positive or negative

void intconvert(int& x, double& numb, double& y);

void decconvert(int& x, double& numb, double& y);

void floattobinary(float f);

int base10(int n, int i);

void printBinary(int n, int i);

/*this function will prompt the user for the value

and display the menu. Using a switch menu this function

will control the flow of the program as selcted by the user*/

// the function only takes one pass by reffenrence value

/*we use union and structure for IEEE 754 REPRESENTATION*/

typedef union

{

float f;

struct

{

unsigned int mantissa : 23;

unsigned int exponent : 8;

unsigned int sign : 1;

} raw;

} myfloat;

void sign(double& numb)

{

if (numb >= 0)

cout << "SIGN BIT IS(1) the number is positive ";

else

cout << "SIGN BIT IS(0) the number is negative ";

}

///////////////////////

//

// separate the integer form the decimal

//function to conver int to binary

// iont x= 000001 (x=1)

// stringz = 000000100 (z=000000100)

void intconvert(int& x, double& numb, double& y)

{

//type case (only the integer part)

x = (int)numb;

//set intbin to empty

//intbin = "";

//print value in base-10 use absolute value

cout << "IN BASE-10 : " << abs(x) << endl;

//print value in binary obtained for thw while loop

cout << "IN BINARY : ";

// setiing x to abs of x to make sure number stays positive

x = abs(x);

//set array size to 8 and assign to 0

int binary_numb[8] = { 0 },

i; //array size to loop through each array

//initilize

i = 0;

//while loop to go through each array

while (x > 0) {

//set each array = to x%2

binary_numb[i] = x % 2;

x = x / 2;//intger division

i++; //increment to move next array

}

//for loop to only display from the array numbers 0 to 7

for (int j = 7; j >= 0; j--)

cout << binary_numb[j];

cout << " ";

}

////////////////////

//

//function to convert decimal part to bianry

void decconvert(int& x, double& numb, double& y)

{

//type case (only the integer part)

x = (int)numb;

//subtract the integer part and store the decimal value in y

y = numb - x; //only the decimal part //only the decimal part

y = abs(y);

//display decimal value in base-10

cout << "IN BASE 10 : " << y << endl;

//display decimal value in binary

cout << "IN BINARY : 0.";

/*while loop to perform multiplicatopn

and obtain the binary */

while ((y < 1))

{

cout << (int)(y * 2);

y = y * 2;

//y++;

}

}

/*for converting float to binary*/

void floattobinary(float f)

{

int bit = 0;

int* b = reinterpret_cast(&f);

cout << ((*b >> 31) & 1) << " ";

for (int k = 30; k >= 23; k--)

{

bit = ((*b >> k) & 1);

cout << bit;

}

cout << " ";

for (int k = 30; k >= 23; k--)

{

bit = ((*b >> k) & 1);

cout << bit;

}

}

/*for converting into base 10*/

int base10(int n, int i)

{

long int x = pow(2, i - 1);

long int sum = 0;

for (int k = i - 1; k >= 0; k--) {

if ((n >> k) & 1)

sum += x;

x /= 2;

}

return sum;

}

/*for printing in IEEE 754 representation*/

void printIEEE(myfloat var)

{

printf("%d | ", var.raw.sign);

printBinary(var.raw.exponent, 8);

printf(" | ");

printBinary(var.raw.mantissa, 23);

printf(" ");

}

////////////////////////////////////////////////hex to binary

// function to find hexadecimal

// equivalent of binary

voidconvertBinToHex(string &ieee)

{

int length = ieee.length();

int start = 0, end = 4;

string str = "";

int count = 1;

for (int t = 0; t < ieee.length(); t++)

{

cout << ieee.at(t);

if (count % 4 == 0)

{

cout << "\t";

}

count++;

}

cout << endl;

count = 1;

for (int t = 0; t < ieee.length(); t++)

{

cout << "-";

if (count % 4 == 0)

{

cout << "\t";

}

count++;

}

for (int i = 0; i < length + 1; i += 4)

{

str = ieee.substr(start, end);

start += 4;

if (str == "0000") cout << "0\t";

if (str == "0001") cout << "1\t";

if (str == "0010") cout << "2\t";

if (str == "0011") cout << "3\t";

if (str == "0100") cout << "4\t";

if (str == "0101") cout << "5\t";

if (str == "0110") cout << "6\t";

if (str == "0111") cout << "7\t";

if (str == "1000") cout << "8\t";

if (str == "1001") cout << "9\t";

if (str == "1010") cout << "A\t";

if (str == "1011") cout << "B\t";

if (str == "1100") cout << "C\t";

if (str == "1101") cout << "D\t";

if (str == "1110") cout << "E\t";

if (str == "1111") cout << "F\t";

str = "";

}

cout << str << hex << endl;

}

/*for printing binary*/

void printBinary(int n, int i)

{

int k;

for (k = i - 1; k >= 0; k--) {

if ((n >> k) & 1)

printf("1");

else

printf("0");

}

}

void prompt_user(double& numb,string& ieee)

{

// declaration

myfloat var;

double y;// double y to store the decimalpart

int x;

float x1; // int x to store the integer par

//initalization

y = 0.0;

x = 0;

//decconvert(y, decbin);

//concat(intbin, decbin, numbin);

//give a descrition of the program

cout << "THIS PROGRAM CONVERTS A BASE-10 DECIMAL VALUE "

<< "TO THE IEEE FLOATING POINT 754 STANDARD ";

//prompt for a base-10 decimal value

cout << " Enter a number: ";

//capturw value

cin >> numb;

x1 = (float)numb;

var.f = x1;

//menu to be desiplay showing the options for the user

cout << "PLEASE CHOOSE ONE OF THE FOLLOWING OPERARATIONS: "

<< "\t1. DISPLAY THE SIGN BIT VALUE "

<< "\t2.DISPLAY THE INTEGER PART IN BOTH BASE-10 AND BINARY FORMATS "

<< "\t3.DISPLAY THE DECIMAL PART IN BOTH BASE-10 AND BINARY FORMATS "

<< "\t4.DISPLAY THE NUMBER ENTERED IN BOTH BASE-10 AND BINARY FORMATS "

<< "\t5.DISPLAY THE MANTISSA IN BINARY FORMAT "

<< "\t6.DISPLAY THE EXPONENT IN BOTH BASE-10 AND BINARY FORMAT "

<< "\t7.DISPLAY THE IEEE 754 SINGLE PRECISION BINARY LAYOUT "

<< "\t8.DISPLAY THE IEEE 754 SINGLE PRECISION HEX LAYOUT ";

// number for menu options

int choice;

//prompt the user for the coice

cout << " Please select the type of function "

<< " you wish the program to execute ";

// captured it

cin >> choice;

// the switch statment is used to control the flow of the program

// based on the choice of the user

// switch statement for execution choice

switch (choice)

{

case 1:

sign(numb);

break;

case 2:

intconvert(x, numb, y);

break;

case 3:

decconvert(x, numb, y);

break;

case 4:

cout << "IN BASE 10 : " << numb << endl;

cout << "IN BINARY : " << endl;

floattobinary(x1);

cout << endl;

break;

case 5:

cout << "MANTISSA IN BINARY : ";

printBinary(var.raw.mantissa, 23);

cout << endl;

break;

case 6:

cout << "IN BASE 10 : " << base10(var.raw.exponent, 8) << endl;

cout << "IN BINAERY : ";

printBinary(var.raw.exponent, 8);

cout << " ";

break;

case 7:

cout << "IEEE 754 REPRESENTATION OF " << numb << " is : ";

printIEEE(var);

cout << endl;

break;

case 8:

//cout << "Number entered is " << var.f << " ";

//cout << "IEEE 754 is ";

//printIEEE(var);

ieee = ieee + to_string(var.f);

//cout << "and \t";

cout << " Hexadecimal representation is = " << endl;

convertBinToHex(ieee); // displaying the number in IEEE format ,32 bits

cout << hex <<" ";

break;

default: cout << "invalid choice ";

break;

}

}

int main()

{

//local variables

double numb;

string ieee;

prompt_user(numb, ieee);

return 0;

}