Question

Alright.

Answer 1

Alright, I did an assignment recently. This was my original output.

[code]
//Ashton Dreiling
//Monthly sales tax exercise

#include <iostream>
#include <stdlib.h>

using namespace std;

//module prototypes
void calculateCountySalesTax(double &countyTax, double &monthySales);
void calculateStateSalesTax(double &monthlySales, double &stateTax);

//global constants to help with mathematical expressions
const double STATE_SALES_TAX_RATE = 0.04;
const double COUNTY_SALES_TAX = 0.02;


int main()
{ //some variables
double monthlySales;
double countyTax;
double stateTax;
double totalSalesTax;

cout << "Today we are going to be calculating your total sales tax."<< endl;
cout << "Please enter your total monthly sales." << endl;
cin >> monthlySales;
cout << "You put that your monthly sales are " << monthlySales << endl;
cout << "We will now calculate your county sales tax." << endl;
//moving to module calculateCountySalesTax
calculateCountySalesTax(countyTax, monthlySales);
cout << "Your county sales tax is $" << countyTax << endl;
cout << "We will now calculate your state sales tax." << endl ;
//moving to module calculateStateSalesTax
calculateStateSalesTax(monthlySales, stateTax);
cout << "Your state sales tax is $" << stateTax << endl;
cout << "Now, give us a minute to calculate your total." << endl;

//total sales tax
totalSalesTax = stateTax + countyTax;

cout << "Your total sales tax is $" << totalSalesTax << endl;


system("Pause");

return 0;
}//end main

void calculateCountySalesTax(double &countyTax, double &monthlySales)
{
countyTax = monthlySales + COUNTY_SALES_TAX;
}//end calculateCountySalesTax

void calculateStateSalesTax(double &monthlySales, double &stateTax)
{
stateTax = monthlySales * STATE_SALES_TAX_RATE;
}//end calculateStateSalesTax
[/code]

This is my instructors code.
[code]// Chapter 3 Programming Exercise: 10
// Ray Warren
// 25 May 2013
// 14 Sept 2013 rewrite with reference parameters to return results

#include <iostream>
#include <cstdlib>
using namespace std;

// Function prototypes
// NOTICE: the use of reference parameters to return results
void getUserInput(double &myTotalMonthlySales);
void calcCountyTax(double myTotalMonthlySales, double &myCountyTax);
void calcStateTax(double myTotalMonthlySales, double &myStateTax);
void displayResults(double myCountyTax, double myStateTax);

// global CONSTANTS
const double COUNTY_TAX = 0.02; // County sales tax rate
const double STATE_TAX = 0.04; // State sales tax rate

int main()
{
double totalMonthlySales = 0; // the user supplied total monthly sales
double countyTax = 0; // the county sales tax
double stateTax = 0; // the state sales tax

// (INPUT) get the total monthly sales from the user
getUserInput(totalMonthlySales);

// (PROCESS) calculate the tax components
calcCountyTax(totalMonthlySales, countyTax);
calcStateTax(totalMonthlySales, stateTax);

// (OUTPUT) display the results
displayResults(countyTax, stateTax);

system("Pause");
return 0;
} // end main()


void getUserInput(double &myTotalMonthlySales)
{ // get the total monthly sales from the user
cout << "Enter the total monthly sales." << endl;
cin >> myTotalMonthlySales;
} // end getUserInput()

void calcCountyTax(double myTotalMonthlySales, double &myCountyTax)
{ // calculate the tax - return the result through reference
myCountyTax = myTotalMonthlySales * COUNTY_TAX;
} // end calcCountyTax()

void calcStateTax(double myTotalMonthlySales, double &myStateTax)
{ // calculate the tax - return the result through reference
myStateTax = myTotalMonthlySales * STATE_TAX;
} // end calcStateTax()

void displayResults(double myCountyTax, double myStateTax)
{ // display the results
cout << "County tax: $" << myCountyTax << endl;
cout << "State tax: $" << myStateTax << endl;
cout << "Total sales tax: $" << (myCountyTax + myStateTax) << endl;
} // end displayResults()[/code]

I know based off of his notes that I made two mistakes.
: countyTax = monthlySales * COUNTY_SALES_TAX; and const double STATE_SALES_TAX_RATE = 0.04;

const double COUNTY_SALES_TAX = 0.02;

If I put those in would that fix the problems I made and therefore would have given me 100%?

Answer 2

@Sachintha

Answer 3

Your code seems right for me. He might have reduced your marks due to the way you have used reference parameters which is not what he might have intended.

Answer 4

@Sachintha

If you read what I said at the bottom I tell you why he reduced points haha. (x

I put his code in there as well so you can confirm it. : )

Answer 5

Yeah you are correct. I didn't notice that earlier. :3 You could have taken 100% by correcting them. :)