CST116 
Module 3: Lab 3

5a 
6.4 Exercises 
p 126 
5 pts #1 
Submit: output
                               OUTPUT:
    cout << a++ << endl;        0
    cout << ++a << endl;        2
    cout << a + 1 << endl;      3
    cout << a << endl;          2
    cout << --a << endl;        1   

7.1 Exercises 
p 148 
5 pts #1­-6 
Submit: corrected conditions

int_exp1 = 0, int_exp2 = 1
char_exp = 'B'
        1. int_exp1 => int_exp2         int_exp1 <= int_exp2 (Flip sign)
        2. int_exp1 = int_exp2          int_exp1 == int_exp2 (Two =)
        3. int_exp1 =! int_exp2         int_exp1 != int_exp2 (= comes second)
        4. char_exp == "A"              char_exp == 'A'      (Single quotes)
        5. int_exp1 > char_exp          Correct
        6. int_exp1 < 2 && > -10        int_exp1 < 2 && int_exp 1 > -10

7.2 Learn by Doing Exercises 
p 155 
10 pts #1 
Submit: code & run 
Total: 15 pts


5b 
7.4 Learn by Doing Exercises 
p 161 
10 pts #1 
Submit: code & run

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

    int main()
    {
        int select;

	    cout << "\n\t\tStudent Grade Program ";
	    cout << "\n\t\t    - Main Menu - ";
	    cout << "\n\t\t1. Enter name ";
        cout << "\n\t\t2. Enter test scores ";
        cout << "\n\t\t3. Display test scores ";
        cout << "\n\t\t9. Exit ";

        cout << "\n\n\tPlease Enter your choice from the list above: ";
        cin >> select;

        switch (select)
        {
        case 1:
            cout << "\n\tYou chose to enter name " << endl;
            break;
        case 2:
            cout << "\n\tYou chose to enter test score " << endl;
            break;
        case 3:
            cout << "\n\tYou chose to display test scores " << endl;
            break;
        case 9:
            cout << "\n\tYou chose to exit " << endl;
            break;
        default:
            cout << "\n\tInvalid option entered." << endl;
        }


        return 0;
    }

RUN:

                Student Grade Program
                    - Main Menu -
                1. Enter name
                2. Enter test scores
                3. Display test scores
                9. Exit

        Please Enter your choice from the list above: 5

        Invalid option entered.

5c 
7.10 Programming Exercises 
p 168 
10 pts #2 
Submit: code & run

PSEUDOCODE:

    Display "Enter loan interest rate "
    Read rate

    Display "Enter loan amount "
    Read loan

    If rate amount is between 1 and 18% && loan amount is between 100 - 1000
        If loan is between 100 - 200
            loan_fee = 20
        If loan > 500
            loan_fee = 25
    If else
        Display error message and end program

    Calculate the amount of interest paid on loan
    Display requested amount of loan
    Display interest rate
    Display sum of interest and fees

CODE:
    #include <iostream>
    using namespace std;

    int main()
    {
        float rate = 0;
        int amount = 0;
        int loan_fee = 0;
        float fees = 0;
        float interest_rate = 0;

        cout << "Enter interest rate percentage: ";
        cin >> rate;

        cout << "Enter loan amount: ";
        cin >> amount;

        if (rate >= 1 && rate <= 18 && amount >= 100 && amount <= 1000)
        {
            if (amount >= 100 && amount <= 500)
                loan_fee = 20;
            else if (amount > 500)
                loan_fee = 25;

            interest_rate = rate / 100;
            fees = amount * interest_rate + loan_fee;

            cout << "Requested amount of loan: " << amount << "\nInterest rate: " << rate << "\nSum of interest and fees: " << fees << endl;
        }
        else
        {
            cout << "Invalid amount entered" << endl;
        }
        return 0;
    }

RUN:
    Enter interest rate percentage 10
    Enter loan amount 500
    Requested amount of loan: 500
    Interest rate: 10
    Sum of interest and fees: 70

6a 
6.5 Exercises 
pp 126-127 
3 pts #1-5 
Submit: converted statements

int a(10), b(20), c(30);
1. a = 25 + a;          a += 25;
2. b = b * a * 2;       b *= a * 2;
3. b = 1 + b;           b += 1; OR b++;
4. c = c % 5;           c %= 5;
5. b = b / a;           b /+ a;

8.2 Learn by Doing Exercises 
pp 177 
10 pts #1 
Submit: code & run

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

    int main()
    {
        int value = 0;

        cout << "Enter an integer between 1 and 50: ";
        cin >> value;

        cout << "Even numbers from " << value << " to 0: \n";
        for (int i = value; i >= 0; i--)
        {
            if (i % 2 == 0)
                cout << i << " ";
        }

        return 0;
    }

RUN:
    Enter an integer between 1 and 50: 25
    Even numbers from 25 to 0:
    24 22 20 18 16 14 12 10 8 6 4 2 0

8.3 Learn by Doing Exercises
pp 179 
10 pts #1 
Submit: code & run

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

    int main()
    {
        int value = 0;

        do
        {
            cout << "\nPlease enter an integer between 1 and 50: ";
            cin >> value;
        } while (value > 50 || value < 1);

        cout << "Even numbers from " << value << " to 0: \n";
        for (int i = value; i >= 0; i--)
        {
            if (i % 2 == 0)
                cout << i << " ";

        }
    
        return 0;
    }

RUN:
    Please enter an integer between 1 and 50: 85

    Please enter an integer between 1 and 50: 25
    Even numbers from 25 to 0:
    24 22 20 18 16 14 12 10 8 6 4 2 0

6b 
8.4 Learn by Doing Exercises 
p 184 
10 pts #2 
Submit: code & run

CODE: 
    #include <iostream>
    using namespace std;

    int main()
    {
        int length = 0;

        cout << "Enter triangle lenth: ";
        cin >> length;

        for (int row = length; row >= 1; row--)
        {
            for (int column = row; column > 0; column--)
            {
                cout << "* ";
            }
            cout << endl;
        }

    }

RUN: 
    Enter triangle lenth: 6
    * * * * * *
    * * * * *
    * * * *
    * * *
    * *
    *

6c 
8.10 Programming Exercises 
p 192 
10 pts #3 
Submit: code & run

#include <iostream>
using namespace std;

int main()
{
    int term1 = 0;
    int term2 = 1;
    int nextTerm = 0;
    int end;

     cout << "Enter an integer: ";
     cin >> end;

     cout << "Fibonacci sequence: " << term1 << ", " << term2 << ", ";

     nextTerm = term1 + term2;

     while(nextTerm <= end) {
         cout << nextTerm << ", ";
         term1 = term2;
         term2 = nextTerm;
         nextTerm = term1 + term2;

     }
     return 0;

}

RUN:
Enter an integer: 21
Fibonacci sequence: 0, 1, 1, 2, 3, 5, 8, 13, 21,