具有不同返回类型和参数的函数C ++

Question

I need an answer for this C++ question, I have worked on it, but clearly im missing something and I will post my answer so far too....

Write a program that will calculate and print pay slips.

User inputs are the name of the employee, the number of hours worked and the hourly pay rate.

You have to declare three functions:

1) one for input;

2) one to calculate the employees pay; and

3) one to print the payslip

The user has to input the name of the employee, the number of hours worked and the hourly pay rate into the variables theEmployee , theHoursWorked and thePayRate . The variable employee is a string and the other two variables are of the type float . As the values of theEmployee, theHoursWorked and thePayRate will be changed in this function, reference parameters need to be used .

The calculation function will receive two parameters that represent the number of hours worked and the hourly pay rate, do the calculation and return the pay for the employee. An employee who has worked more than 40 hours is paid 1.5 times the hourly pay rate for each hour of the overtime. As the parameters are not changed in the function, they should be value parameters. The function should return a float value which represents the pay.

The output function has to display the name of the employee, the number of hours worked, the number of overtime hours and the hourly pay rate entered by the user as well as the employee's pay. for

Example:

Pay slip for Pink Panther

Hours worked: 43.5 hours

Overtime hours: 3.5 hours

Hourly pay rate: R125.35

Pay: R5672.09

The main function includes a for loop that allows the user to repeat the calculation of a pay slip for five employees.

int main()
{
string theEmployee;
float theHoursWorked;
float thePayRate;
int thePay;

for (int i = 0; i < 5; i++)
{
    getData(theEmployee, theHoursWorked, thePayRate);
    thePay = calculatePay (theEmployee, theHoursWorked, thePayRate);
    printPaySlip(theEmployee, theHoursWorked, thePayRate, thePay);
}

return 0;
}

THATS WHAT THEY GAVE, this is what I have done so far, I guess that I am struggling with the reference parameters?

#include <iostream>
#include <string>

using namespace std;

int getData (string & theEmployee , float & theHoursWorked, float & thePayRate)
{
cout<< "Enter your name and surname: "<< endl;
getline(cin, theEmployee);

cout << "Include the numbers of hours you worked: " << endl;
cin >> theHoursWorked;

cout << "What is your hourly pay rate?" << endl;
cin >> thePayRate;

return theEmployee, theHoursWorked, thePayRate;

}

float calculatePay( string & theEmployee, float & theHoursWorked, float & thePayRate)
{
float tempPay, thePay, overtimeHours;
if (theHoursWorked > 40)
    {
    tempPay = 40 * thePayRate;
    overtimeHours = theHoursWorked - 40;
    thePay = tempPay + overtimeHours;}
else
    thePay = theHoursWorked * thePayRate;
    return thePay;
}

int printPaySlip( string & theEmployee, float & theHoursWorked, float &    
thePayRate, float thePay)
{
float overtimeHours;
cout << "Pay slip for " << theEmployee <<endl;
cout << "Hours worked: "<< theHoursWorked << endl;
if (theHoursWorked > 40)
    overtimeHours = theHoursWorked - 40;
else
    overtimeHours = 0;
cout << "Overtime hours: "<< overtimeHours << endl;
cout << "Hourly pay rate: " << thePayRate << endl;
cout << "Pay: " << thePay << endl;
cout << endl;

}


int main()
{
string theEmployee;
float theHoursWorked;
float thePayRate;
int thePay;

for (int i = 0; i < 5; i++)
{
    getData(theEmployee, theHoursWorked, thePayRate);
    thePay = calculatePay (theEmployee, theHoursWorked, thePayRate);
    printPaySlip(theEmployee, theHoursWorked, thePayRate, thePay);
}

return 0;
}

Answer 1

No need for return in the getData functrion. This should work

void getData (string & theEmployee , float & theHoursWorked, float & thePayRate)
{
    cout<< "Enter your name and surname: "<< endl;
    getline(cin, theEmployee);

    cout << "Include the numbers of hours you worked: " << endl;
    cin >> theHoursWorked;

    cout << "What is your hourly pay rate?" << endl;
    cin >> thePayRate;

}

Note the getData function is declared void, which means strictly speaking it does not return a value. In your problem spec 'return' is being used loosely to mean a value which a function calculates and then gives back to the calling function, it's doesn't mean you have to have an actual return in your code.

BTW not the qestion you asked but you are going to have trouble because you are mixing getline with >> . See here for an explanation.

Answer 2

First, getData and printPaySlip functions shouldn't return anything - return type should be changed from int to void .

Second, the line return theEmployee, theHoursWorked, thePayRate is an error and should be removed - C++ doesn't allow multiple return values, and uses reference parameters instead. This means that the function is allowed to modify its parameters. You already read them correctly, so simply remove the return line.

Third, the calculatePay and printPaySlip functions do not require references, as they do not modify the parameters. Even the problem statement says they should take values, so simply remove the & 's.

Fourth, your calculatePay function calculates the rate for overtime hours incorrectly - it simply adds the amount of overtime hours to the total pay without multiplying it by thePay * 1.5 .