C++ Overtime / Payroll / Time and a half/ Double Time - c++

Question

i know my if statement is not correct somewhere but i do not know where? or maybe its just the logical error?
After 8 hours any hours worked will be paid time and a half. That is, given the wage per hour multiply by 1.5. That wage is paid for hours after 8 hours.
After 10 hours any hours worked will be paid double time. That is, given the wage per hour multiply by 2.0. That wage is paid for hours after 10 hours.
Please show: ( Example output )
Wage per hour: 12.37
Hours worked : 10.3
Pay for ( 0 to 8 hours) : 98.96
Pay for hours 8 to 10) : 37.11
Pay for hours (10 and beyond): 7.42
Total Gross Pay : 143.49
// Example program
#include <iostream>
#include <string>
using namespace std;
double HoursWorked;
double WagePerHour;
double TotalWages;
double TimeAndHalf;
double Overtime;
char ContinueChar;
//test cases: 10.5 hours # 12/hour = $96.00, 2 hours at 1.5 rate = $36.00, .5 hour at 2.0 rate = $12.00
// 6.3 hours # 12/hour = 75.6, no hours of overtime or double time
//12.5 hours # 14.34/ hour = $114.72, 2 hours at 1.5 rate = 43.02, 2.5 hours at 2.0 rate = $71.70
//3.7 hours # 19/hour = $70.30
// 14 hours # 23.50/hour = $188, 2 hours at 1.5 rate = $70.50, 4 hours at 2.0 rate = $188
//I tested with test test cases and the program had the same results.
int main()
{
cout << "Ticket #64220\n";
cout << "CMPR-120\n";
cout << "Instructor : Joel Kirscher\n";
cout << "Student: Seyed Shariat\n";
cout << "Payroll Overtime";
cout << "\n\n";
do {
cout << "How many hours did you work this pay period: \n";
cin >> HoursWorked;
cout << "What wage do you get paid per hour?: \n";
cin >> WagePerHour;
cout << "So you your paycheck will be: " << HoursWorked * WagePerHour << " before taxes are taken out. \n";
if (HoursWorked > 8 && <= 10)
cout << "For the hours you worked over 8, and less than or equal to 10 you made: " << HoursWorked * 1.5 * WagePerHour << " \n";
else (HoursWorked >10);
cout << "For the hours you worked over 10: " << HoursWorked * 2.0 * WagePerHour << " \n";
cout << "Do you want this to run again? (y=Yes): ";
cin >> ContinueChar;
} while (ContinueChar == 'y' || ContinueChar == 'Y');
cin.get();
return 0;
}

Answer 1

There are many approaches to this. Here is one. The comments may help you to follow my reasoning. Fortunately the mathematics behind this is not very complicated.
/*
We need to find the area under this pay rate / hours worked graph.
The following approach divides the graph into three rectangles as shown below
2.0 | +--+
| | |
1.5 | +-+--|
| | |
1.0 +-------+----|
| |
0.5 | |
| |
0.0 +------------+
0 8 10
*/
// Calculate basic pay before any overtime consideration
Pay = HoursWorked * HourlyRate;
// Hours above 8 earn half-again more than the standard wage.
// (This will be only positive if more than 8 hours were worked.)
OvertimePay = (HoursWorked - 8.0) * HourlyRate * 0.5;
if(OvertimePay > 0.0)
Pay += OvertimePay;
// Hours above 10 earn an additional 50% extra
// (This will be only positive if more than 10 hours were worked.)
OvertimePay = (HoursWorked - 10.0) * HourlyRate * 0.5;
if(OvertimePay > 0.0)
Pay += OvertimePay;