// Display the prediction. System.out.println("Ampara district sales prediction: $" + eastcoastsales);

Transcription

1 Exercise 01 public class SumOfTwoNumbers int number1, number2, total; number1 = 62; number2 = 99; total = number1 + number2; // Assign the first number // Assign the second number // Calculate the sum Exercise 02 public class SalesPrediction double totalsales = ; // Total sales double amparasales; // Ampara district sales // Calculate Ampara district sales. amparasales = totalsales * 0.62; // Display the prediction. System.out.println("Ampara district sales prediction: $" + eastcoastsales); Exercise 03 public class NameAgeAnnualIncome String name; // To hold a name int age; // To hold an age double annualincome; // To hold annualincome // Store values in the String object and variables. name = "Sams SaNa"; age = 33; annualincome = ; // Display a message. System.out.println("My name is " + name + ", my age is " + age + " and I hope to earn Rs." +annualincome+ " per year."); Fundamentals of Programming by S. Sabraz Nawaz Page 1

2 Exercise 04 public class PersonalInformation // The "\n" is an escapte character used to create a new line System.out.println("Sabraz Nawaz\n" + "124 Main Street\n" + "Sainthamaruthu-01, EP 32280\n" + "(077) \n" + "Information Systems"); Exercise 05 public class NameAndInitials String firstname = "Sabraz"; // First name String middlename = "Nawaz"; // Middle name String lastname = "Samsudeen"; // Last name char firstinitial; char middleinitial; char lastinitial; // To hold the first initial // To hold the middle initial // To hold the last initial // Get the initials. firstinitial = firstname.charat(0); middleinitial = middlename.charat(0); lastinitial = lastname.charat(0); // Display the contents of the variables. System.out.println("Name: " + firstname + " " + middlename + " " + lastname); System.out.println("Initials: " + firstinitial + middleinitial + lastinitial); Exercise 06 (Constants) public class StockCommission // Constants final int NUM_SHARES = 600; // Number of shares final double STOCK_PRICE = 21.77; // Price per share final double COMM_PERCENT = 0.02; // Commission percentage double stockcost; // Cost of stock double commission; // Commission double total; // Total of the transaction // Calculate the stock cost. stockcost = STOCK_PRICE * NUM_SHARES; // Calculate the commission. commission = stockcost * COMM_PERCENT; Fundamentals of Programming by S. Sabraz Nawaz Page 2

3 MIT 11053, Lab sheet #02 // Calculate the total. total = stockcost + commission; System.out.println("Stock cost: Rs." + stockcost); System.out.println("Commission: Rs." + commission); System.out.println("Total: Rs." + total); Exercise 07 public class EnergyDrinks // Constant for the number surveyed final int NUM_SURVEYED = 12467; // Constant for the percentage who purchase // energy drinks final double ENERGY_DRINKERS_PCT = 0.14; // Constant for the percentage of energy drinkers // who prefer citrus flavor final double PREFER_CITRUS_PCT = 0.64; double energydrinkers; // Number of energy drinkers double prefercitrus; // Number that prefer citrus // Calculate the number of energy drinkers. energydrinkers = NUM_SURVEYED * ENERGY_DRINKERS_PCT; // Calculate the number of energy drinkers that // prefer citrus flavor. prefercitrus = energydrinkers * PREFER_CITRUS_PCT; System.out.println("We surveyed " + NUM_SURVEYED + " people."); System.out.println("Out of those surveyed, approximately " + energydrinkers + " purchase at least one " + "energy drink per year."); System.out.println("Approximtely " + prefercitrus + " of those " + "prefer citrus flavored energy drinks."); Exercise 08 import java.util.scanner; // Needed for the Scanner class public class TestAverage double test1; // Test score #1 double test2; // Test score #2 double test3; // Test score #3 double average; // Average of the test scores Fundamentals of Programming by S. Sabraz Nawaz Page 3

4 MIT 11053, Lab sheet #02 // Create a Scanner object for keyboard input. // Get the first test score. System.out.print("Enter test score #1: "); test1 = keyboard.nextdouble(); // Get the second test score. System.out.print("Enter test score #2: "); test2 = keyboard.nextdouble(); // Get the third test score. System.out.print("Enter test score #3: "); test3 = keyboard.nextdouble(); // Calculate the average. average = (test1 + test2 + test3) / 3.0; // Display the average. System.out.println("Test average: " + average); Exercise 09 import java.util.scanner; public class RestaurantBill // Constants final double TAX_RATE = ; // Tax rate final double TIP_PERCENT = 0.15; // Tip percentage double mealcharge; // To hold the meal charge double tax; // To hold the amount of tax double tip; // To hold the tip amount double total; // To hold the total charge // Create a Scanner object for keyboard input. // Get the charge for the meal. System.out.print("Enter the charge for the meal: "); mealcharge = keyboard.nextdouble(); // Calculate the tax. tax = mealcharge * TAX_RATE; // Calculate the tip. tip = mealcharge * TIP_PERCENT; // Calculate the total. total = mealcharge + tax + tip; System.out.println("Meal Charge: $" + mealcharge); Fundamentals of Programming by S. Sabraz Nawaz Page 4

5 MIT 11053, Lab sheet #02 System.out.println("Tax: $" + tax); System.out.println("Tip: $" + tip); System.out.println("Total: $" + total); Exercise 10 (Using Scanner class and Constants) import java.util.scanner; // Needed for the Scanner class public class SalesTax // Constants final double STATE_RATE = 0.04; // State tax rate final double COUNTY_RATE = 0.02; // County tax rate double purchase; double statetax; double countytax; double totaltax; double totalcost; // Amount of purchase // Amount of state sales tax // Amount of county sales tax // Total sales tax // Total cost of the purchase // Create a Scanner object for keyboard input. // Get the amount of the purchase. System.out.print("Enter the purchase amount: "); purchase = keyboard.nextdouble(); // Calculate the state sales tax. statetax = purchase * STATE_RATE; // Calculate county sales tax. countytax = purchase * COUNTY_RATE; // Calculate the total sales tax. totaltax = statetax + countytax; // Calculate the total purchase cost. totalcost = purchase + totaltax; System.out.println("Purchase amount: Rs." + purchase); System.out.println("State tax: Rs." + statetax); System.out.println("County tax: Rs." + countytax); System.out.println("Total tax: Rs." + totaltax); System.out.println("Total cost: Rs." + totalcost); Fundamentals of Programming by S. Sabraz Nawaz Page 5

6 Exercise 11 public class StockTransaction // Named constants final int NUM_SHARES = 1000; // Number of shares final double PURCHASE_PRICE = 32.87; // Purchase price per share final double SELLING_PRICE = 33.92; // Selling price per share final double BROKER_COMM_RATE = 0.02; // Broker commission rate // Calculate the cost of the stock (without the // broker's commission) and store the result // in stockpurchase. double stockpurchase = (NUM_SHARES * PURCHASE_PRICE); // Calculate the broker's commission on the purchase and // store the result in purchasecomm. double purchasecomm = stockpurchase * BROKER_COMM_RATE; // Calculate the total amount SaNa paid for the stock plus the // broker's commission and store the result in amountpaid. double amountpaid = stockpurchase + purchasecomm; // Calculate the amount SaNa sold the stock for and store // the result in stocksale. double stocksale = NUM_SHARES * SELLING_PRICE; // Calculate the broker's commission on the sale and // store the result in sellingcomm. double sellingcomm = (NUM_SHARES * SELLING_PRICE) * BROKER_COMM_RATE; // Calculate the amount that SaNa actually recieved after // selling the stock and paying his broker the sales // commission, and store the result in amountrecieved. double amountrecieved = stocksale - sellingcomm; // Calculate the amount of profit or loss, and store the // result in profitorloss. If a profit was made, the amount // will be positive. If a loss was incurred, the amount // will be negative. double profitorloss = amountrecieved - amountpaid; System.out.println("SaNa paid Rs." + stockpurchase + " for the stock."); System.out.println("SaNa paid his broker a commission of Rs." + purchasecomm + " on the purchase."); System.out.println("So, SaNa paid a total of Rs." + amountpaid + "\n"); System.out.println("SaNa sold the stock for Rs." + stocksale); System.out.println("SaNa paid his broker a commission of Rs." + sellingcomm + " on the sale."); System.out.println("So, SaNa recieved a total of Rs." + amountrecieved + "\n"); System.out.println("SaNa's profit or loss: Rs." + profitorloss); Fundamentals of Programming by S. Sabraz Nawaz Page 6

7 Exercise 12(String Manipulation) public class NameAndInitials String firstname = "Sabraz"; // First name String middlename = "Nawaz"; // Middle name String lastname = "Samsudeen"; // Last name char firstinitial; char middleinitial; char lastinitial; // To hold the first initial // To hold the middle initial // To hold the last initial // Get the initials. firstinitial = firstname.charat(0); middleinitial = middlename.charat(0); lastinitial = lastname.charat(0); // Display the contents of the variables. System.out.println("Name: " + firstname + " " + middlename + " " + lastname); System.out.println("Initials: " + firstinitial + middleinitial + lastinitial); Exercise 13 import java.util.scanner; // Needed for the Scanner class public class StringManipulator String city; // To hold user input System.out.print("Enter the name of your favorite city: "); city = keyboard.nextline(); System.out.println("Number of characters: " + city.length()); System.out.println(city.toUpperCase()); System.out.println(city.toLowerCase()); System.out.println(city.charAt(0)); Fundamentals of Programming by S. Sabraz Nawaz Page 7