Question

Programming Language is Java

Lab 1: Programming Exercises Input/Process/Output

1) Run the Numbers.

Write a program with two input values. The program should display the sum, difference, quotient, product, and average of the two numbers.

2) Jake’s Problem.

Jake has a car with an 8-gallon fuel tank. Jake fills his tank with gas and drives 60 miles to a friend’s house. When he gets to his friend’s house, he has 6 gallons left in his fuel tank. Write a program that uses three input elements to enter values for tank size, miles traveled and gallons left. The program should calculate and display how many miles Jake can drive on a full tank of gas.

(Note: Be sure to use input elements to accept the values 8, 60, and 6 rather than hard coding then into your solution.)

3) Correct Change.

Write a program to assist a cashier with determining correct change. The program should have one input, the number of cents to return to the customer. The output should be the appropriate change in quarters, dimes, nickels and cents.

Hint: Consider how integer division (\) and integer remainder (Mod) can be used as part of your solution.

Answer 1

Answers:

Lab1.

1)Run the Numbers.

raw code:

//import
import java.util.Scanner;
public class Run_The_Numbers{//class name
   public static void main(String[] args) { //main method
       Scanner scnr= new Scanner(System.in);//creating an scanner object
//      
       System.out.println("Enter the first value:");//taking the first input into variable called a
       int a= scnr.nextInt();
       System.out.println("Enter the second value:");
       int b=scnr.nextInt();//taking the first input into variable called b
       System.out.println("Sum: "+(a+b)); //adding the inputs
       System.out.println("Difference: "+(a-b));//subtracting the second input from first input
       System.out.println("Product: "+(a*b));//multiplying the values
       System.out.println("Quotient: "+(a/b));//dividing a by b
       System.out.println("Average: "+((a+b)/2));// adding the both inputs and dividing it by 2 get average

   }
  

}
code in editor:

output:

2) Jake’s Problem.

Raw code:

//imports
import java.util.Scanner;
public class Jakes_problem {//class name
   public static void main(String[] args) {//main method
       Scanner scnr= new Scanner(System.in);//creating scanner object
       System.out.println("Enter the tanksize: ");
       int tank_size=scnr.nextInt();//taking the input from user for the tank_size
       System.out.println("Enter the miles Travelled:");
       int miles_travelled=scnr.nextInt();//taking the input from user for the total_miles he travelled for friends house
       System.out.println("Enter the gallons left in tank");
       int gallons_left=scnr.nextInt();//taking the input from user for the gallons of gas left in the tank after he reached his friends house
       int gallons_consumed= tank_size- gallons_left;//to calculate the gallons consumed to travel to his friend house
       int miles_per_gallon= miles_travelled/gallons_consumed;//to calculate the miles can be covered using one gallon of fuel
       int total;
       total=tank_size*miles_per_gallon; //to calculate the total miles can be covered with the full tank of fuel
       System.out.println("Total miles can be covered using the Full Tank:"+total);
      
   }

  

}
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output:

3) Correct Change.

raw code:

// Importing packages
import java.util.*;
public class CorrectChange{
   public static void main(String[] args) {
       Scanner s = new Scanner(System.in); // Creating Scanner object for reading input from user.

System.out.print("Enter no of cents: ");
       int n = s.nextInt(); // Taking no of cents from user
       int arr[] = new int[4]; // Creating int array 'arr'.It's automatically intialized with '0's
       // arr[0] -> "Quarters" ; arr[1] -> "Dimes" ; arr[2] -> "Nickels" ; arr[3] -> "cents"
       while(n>0){ // This loop will iterate until the n value is greater then 0
           if ((n/25)>=1){ // If the 'n' is divisible by 25
               arr[0] = arr[0] + (n/25); // Here (n/25) gives the no of 'Quarters'.Incrementing the no of Quarters
               n = n%25; // Updating the n value with mod operator.It's Nothing but updating the n value with remainder of n/25.
               continue;
           }
           else if ((n/10)>=1) { // If the 'n' is divisible by 10
               arr[1] = arr[1] + (n/10); // Here (n/10) gives the no of 'Dimes'.Incrementing the no of Dimes
               n = n%10; // Updating the n value with mod operator.It's Nothing but updating the n value with remainder of n/10.
               continue;
           }
           else if ((n/5)>=1) { // If the 'n' is divisible by 5
               arr[2] = arr[2] + (n/5); // Here (n/5) gives the no of 'Nickels'.Incrementing the no of Nickels
               n = n%5; // Updating the n value with mod operator.It's Nothing but updating the n value with remainder of n/5.
               continue;
           }
           else{
               arr[3]++; // Incrementing the no of cents
               n--; // Decrementing the n vlaue.
           }
       }
       System.out.println( arr[0] + " Quarters\n" + arr[1] + " Dimes\n" + arr[2] + " Nickels\n" + arr[3] + " cents\n" );
   }
}

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output: