slove using this code

#include

using namespace std;

int main()

{

// Declaring constants

const int tref = 20;

// Declaring variables

int rref, t;

char ch;

double tempCoeff, R;

// Getting the input entered by the user

cout

cin >> rref;

cout

cin >> t;

/* This while loop continues to execute

* until the user enters a valid character

*/

while (true)

{

cout

cout

cout

cout

cout

cin >> ch;

switch (ch)

{

case 'a':

{

tempCoeff = 0.005866;

break;

}

case 'b':

{

tempCoeff = 0.004041;

break;

}

case 'c':

{

tempCoeff = 0.003819;

break;

}

case 'd':

{

tempCoeff = 0.003715;

break;

}

default:

{

cout

continue;

}

}

break;

}

// Calculating the conductor resistance at Temperature T

R = rref * (1 + tempCoeff * (t - tref));

// Displaying the output

cout

system("pause");

return 0;

}

Font Paragraph R = Rref [1 + a(T-Tref)] In this formula: R is the conductor resistance at temperature T (in ohms) Ref is the resistance at reference temperature (in ohms) T is the operating temperature in degrees Celsius Tref is the reference temperature, Tief 20C a is the temperature coefficient of resistance for the conductor material . . . . As in the Task 1, get user entered values for Rre and T, and set the value of Traf to 20C. Using either switch or if else statement, allow the user to choose from one of the following four conductors: iron, copper, silver or gold. You must demonstrate your knowledge of functions: to obtain the value of the temperature coefficient a, you must store each of the values for a in a function, using one for each of the four conductors on offer. The temperature coefficient values are: Iron Copper Silver Gold a 0.005866 a = 00.4041 a= 0.003819 a = 0.003715 When users choice of the conductor type is received in the main0, retrieve the value for a from the corresponding function, return it to the mainO and use it to calculate R, printing the result ton the console screen Note: You are encouraged to reuse the code developed in Task 1. To demonstrate your knowledge of the development environment in use, answer the following In your code, you may use void or int as the retum value of your main0. Which one did you use? Explain the difference between these two choices, (Ctrl)