CST116 
Module 4: Lab 4

7a 
6.8 Exercises 
pp 132-133 
5 pts #1-9 
Submit: value of “a” after the expression is executed
1. a = sqrt(9.0);					a = 3.0
2. a = sqrt(-9.0);					We cannot sqrt a negative
3. a = pow(2.0, 5);					32
4. a = pow(2.0, -2);				.25
5. a = ceil(5.1);					a = 6
6. a = ceil(5.9);					a = 6
7. a = floor(5.1);					a = 5
8. a = floor(5.9);					a = 5
9. a = sqrt(pow(abs(-2), 4) )		a = 4


9.3 
Exercises 
p 207 
10 pts #1 
Submit: code & run 
Total: 15 pts

CODE:
	#include <iostream>
	using namespace std;

	void average(float& num1, float& num2, float& num3);

	int main()
	{
		float num1, num2, num3;

		average(num1, num2, num3);
		return 0;
	}

	void average(float& num1, float& num2, float& num3)
	{
		float avg = 0;

		cout << "\nEnter the first number: ";
		cin >> num1;

		cout << "\nEnter the second number: ";
		cin >> num2;

		cout << "\nEnter the third number: ";
		cin >> num3;

		avg = (num1 + num2 + num3) / 3;
		cout << "\n\tThe average is " << avg << endl;

	}
 

RUN:
	Enter the first number: 9

	Enter the second number: 4

	Enter the third number: 6

			The average is 6.33333

7b 
9.4 Learn by Doing Exercises 
p 214 
10 pts #1 
Submit: code & runs

CODE:
	#include <iostream>
	#include <iomanip>
	using namespace std;

	void GetInput(float& salary, int& years_service); 
	void CalcRaise(float& salary, int& years_service);
	int CalcBonus(int years_service);
	void PrintCalculations(float salary, int years_service, int bonus);

	int main()
	{
		int years_service = 0;
		float salary = 0.0;
		int bonus = 0;
	
		GetInput(salary, years_service);
		CalcRaise(salary, years_service);
		bonus = CalcBonus(years_service);
		PrintCalculations(salary, years_service, bonus);
		return 0;
	}

	void GetInput(float& salary, int& years_service)
	{
		cout << "Enter the employee's salary: ";
		cin >> salary;
		if (salary > 0)
		{
			cout << "Enter the employee's years of service: ";
			cin >> years_service;
		}

	}
	void CalcRaise(float& salary, int& years_service)
	{
		if (years_service > 10)
		{
			salary = salary + (salary * .10);
		}
		else if (years_service >= 5 && years_service <= 10)
		{
			salary = salary + (salary * .05);
		}
		else
		{
			salary = salary + (salary * .02);
		}
	}
	int CalcBonus(int years_service)
	{
		int bonus = 0;
		int addBonus = 0;
		addBonus = years_service / 2;
		bonus = addBonus * 500;
		return bonus;
	}
	void PrintCalculations(float salary, int years_service, int bonus)
	{
		cout << "\n\t   * Employee Stats *";
		cout << "\n\tYears of Service: " << years_service;
		cout << "\n\tSalary After Raise: " << salary;
		cout << "\n\tYour Bonus: " << bonus << endl;
	}


RUN 1:
    Enter the employee's salary: 5000
    Enter the employee's years of service: 20
      
                * Employee Stats *
            Years of Service: 20
            Salary After Raise: 5500
            Your Bonus: 5000

RUN 2:
    Enter the employee's salary: 5000
    Enter the employee's years of service: 10

               * Employee Stats *
            Years of Service: 10
            Salary After Raise: 5250
            Your Bonus: 2500


7c 
9.5 Learn by Doing Exercises 
p 216 
10 pts #2 
Submit: code & runs

CODE:
	#include <iostream>
	#include <iomanip>
	using namespace std;

	void GetInput(int& hour, int& min, int& sec);
	void Display(int& hour, int& min, int& sec, int& disp);

	int main()
	{
		int hour, min, sec;
		int disp;

		GetInput(hour, min, sec);
		Display(hour, min, sec, disp);

		return 0;
	}

	void GetInput(int& hour, int& min, int& sec)
	{

		cout << "Enter the hour: ";
		cin >> hour;

		cout << "\nEnter the minute(s): ";
		cin >> min;

		cout << "\nEnter the second(s): ";
		cin >> sec;
	}
	void Display(int& hour, int& min, int& sec, int& disp)
	{
		int time = 0;

		cout << "\n\t\t  Display Options ";
		cout << "\n\t\t1. Military Time ";
		cout << "\n\t\t2. 24 Hour Time ";
		cout << "\n\t\t3. Default Time ";

		cout << "\n\n\tHow is your time displayed? ";
		cin >> disp;

		switch (disp)
		{
		case 1:
		
			cout << "\n " << setw(2) << setfill('0') << hour;
			cout << setw(2) << setfill('0') << min;
			cout << setw(2) << setfill('0') << sec << endl;
			break;
		case 2:
		
			cout << "\n " << setw(2) << setfill('0') << hour;
			cout << ":" << setw(2) << setfill('0') << min;
			cout << ":" << setw(2) << setfill('0') << sec << endl;
			break;
		case 3:
		
			cout << "\n\t\t  a.m. or p.m.? ";
			cout << "\n\t\t 1. a.m.";
			cout << "\n\t\t 2. p.m.";

			cout << "\n\n\tIs the time a.m. or p.m.? ";
			cin >> time;

			switch (time)
			{
			case 1:
				cout << "\n " << hour;
				cout << ":" << setw(2) << setfill('0') << min;
				cout << ":" << setw(2) << setfill('0') << sec << " a.m. " << endl;
				break;

			case 2:
				cout << "\n " << hour;
				cout << ":" << setw(2) << setfill('0') << min;
				cout << ":" << setw(2) << setfill('0') << sec << " p.m. " << endl;
				break;

			default:
				cout << "\n\tInvalid option entered." << endl;
			}
			break;
		default:
			cout << "\n\tInvalid option entered." << endl;
		}
	} 

RUN 1:
	Enter the hour: 2

	Enter the minute(s): 42

	Enter the second(s): 5

					  Display Options
					1. Military Time
					2. 24 Hour Time
					3. Default Time

			How is your time displayed? 1

	 024205

 RUN 2:
	Enter the hour: 8

	Enter the minute(s): 6

	Enter the second(s): 13

					  Display Options
					1. Military Time
					2. 24 Hour Time
					3. Default Time

			How is your time displayed? 2

	 08:06:13

RUN 3:
	Enter the hour: 3

	Enter the minute(s): 3

	Enter the second(s): 25

					  Display Options
					1. Military Time
					2. 24 Hour Time
					3. Default Time

			How is your time displayed? 3

					  a.m. or p.m.?
					 1. a.m.
					 2. p.m.

			Is the time a.m. or p.m.? 2

	 3:03:25 p.m.

8a 
9.13 Debugging Exercises 
pp 226-229 
10 pts #1 
Submit: code & runs

CODE:
//Debugging Exercise 1
	#include <iostream>
	using std::cout;
	using std::cin;
	using std::endl;

	const int DAYS_PER_YEAR = 365;

	int GetAge(int& age);
	int CalcDays(int age);
	void PrintResults(int age, int days);

	int main()
	{
		int age = 0;
		int days = 0;

		// Breakpoint 1
		// Put breakpoint on the following line 
		GetAge(age);
		days = CalcDays(age);

		// Breakpoint 2
		// Put breakpoint on the following line
		PrintResults(age, days);

		return 0;
	}
	int GetAge(int& age)
	{
    
		cout << "Please enter your age: ";
		cin >> age;

		return age;
	}
	int CalcDays(int years)
	{
		int days;

		days = years * DAYS_PER_YEAR;

		return days;
	}
	void PrintResults(int days, int age)
	{
		cout << age << "! Boy are you old!\n";
		cout << "Did you know that you are at least " << days << " days old?\n\n";
	}

/*Debugging Exercise 2
*
* 1) Run to Breakpoint 1.
* 2) Step over the call to GetAge.
* 3) Step into CalcDays.
* 4) Step into one more time so that the current line is the
*    calculation.
* 5) Why is age greyed out in your watch window?		Because age does not show up within this function.
* 6) Stop debugging.
*/

//Debugging Exercise 3
	#include <iostream>
	using std::cout;
	using std::cin;
	using std::endl;

	const int DAYS_PER_YEAR = 365;

	int GetAge(int& age);
	int CalcDays(int age);
	void PrintResults(int age, int days);

	int main()
	{
		int age = 0;
		int days = 0;

		// Breakpoint 1
		// Put breakpoint on the following line 
		GetAge(age);
		days = CalcDays(age);

		// Breakpoint 2
		// Put breakpoint on the following line
		PrintResults(age, days);

		return 0;
	}
	int GetAge(int& age)
	{
    
		cout << "Please enter your age: ";
		cin >> age;

		return age;
	}
	int CalcDays(int years)
	{
		int days;

		days = years * DAYS_PER_YEAR;

		return days;
	}
	void PrintResults(int age, int days)
	{
		cout << age << "! Boy are you old!\n";
		cout << "Did you know that you are at least " << days << " days old?\n\n";
	}

/*Debugging Exercise 4
*
* 1) Run to Breakpoint 2.
* 2) Display your Call Stack window.
* 3) View the contents of the window and notice that the top
*    function on the stack is main.
* 4) Step into the PrintResults function.
* 5) Notice that the call stack now shows PrintResults on top of
*    the stack.
********************************************************************/


8b 
9.14 Programming Exercises 
pp 229 
10 pts #1 
Submit: code & run

CODE:
	#include <iostream>
	using namespace std;

	int main()
	{
		int row = 0;
		int width = 0;
		int height = 0;

		cout << "Input height: ";
		cin >> height;

		cout << "Input width: ";
		cin >> width;

		cout << char(218);
		for (int row = 0; row < width; row++)
			cout << char(196);
		cout << char(191) << endl;

		for (int row = 0; row < height; row++)
		{
			cout << char(179);
			for (int side = 0; side < width; side++)
				cout << " ";
			cout << char(179) << endl;
		}
		cout << char(192);

		for (int row = 0; row < width; row++)
			cout << char(196);
		cout << char(217) << endl;

		return 0;
	}



RUN:
	Input height: 5
	Input width: 20
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