Question

Objective: Find out the “true” MPG (Miles Per Gallon) of a vehicle, given a group of conditions which the user provides values for. 5 are given, 1 you create on your own. Requirements: Prompt the user for the car’s MPG first. i.e. Please Enter MPG: 26 Then prompt the user to enter a value for six factors which will affect the MPG of the vehicle, prompting for single value inputs after showing menus (i.e. a series of println() statements showing the options/valid values to enter) After collecting all of the inputs, provide a detailed report of the inputs, their meaning, how much they affect MPG, as well as the the beginning and final MPG. The following criteria will be used for the six inputs. City or Highway Driving: Use a boolean type variable for input City Subtracts 2 from MPG Highway Adds 5 to MPG Rainy or Sunny: Use a String type variable for input “Rainy” Subtracts 1 from MPG “Sunny” No Change to MPG Elevation: Use a char type variable for input ‘S’ for Steep, Steep Subtracts from 5MPG ‘H’ for Hilly, Hilly Subtracts 3 from MPG ‘F’ for Flat, No Change to MPG Weight in Vehicle (cargo or passenger): Use double type for input Each 100lbs subtracts 0.5 MPG Speed Preference: Use an int type variable for input 1 for under speed limit, Add 2 to MPG 2 for at speed limit, No Change to MPG 3 for 5% above speed limit, Subtract 1 from MPG 4 for 10% above speed limit, Subtract 3 from MPG 5 for over 20% above speed limit, Subtract 5 from MPG Suggestion: Use a switch() statement for Speed Preference Add one additional factor which you will prompt the user for, that affects MPG such as tire pressure/condition, hybrid vs. gas powered, engine condition, towing load, 2WD/4WD,

Answer 1

import java.util.*; //MPG Calculater class class MPGCalculater{    Scanner sc;//scanner class    double mpg;//mpg    int option;    public MPGCalculater(){        sc=new Scanner(System.in);        System.out.println("Enter intial mpg::");        mpg=sc.nextDouble();        System.out.println("MPG::"+mpg);        //doing job        while(true){            menu(); //displaying menu            System.out.printf("Enter ur option::");            option=sc.nextInt();//taking user selection                       if(option==0){                break;//stoping programe            }            //chosing apprpriate function based on users choice            switch(option){                case 1:                    CityOrDriving();                    break;                case 2:                    RainySunny();                    break;                case 3:                    Elevation();                    break;                case 4:                    weightInVenhicle();                    break;                case 5:                    speed();                    break;                case 6:                    towingload();                    break;                default:                    System.out.println("Invalid option");                    break;            }        }           }    //menu    public void menu(){        System.out.println("Choose");        System.out.println("1->City or Highway Driving");        System.out.println("2->Rainy or Sunny:");        System.out.println("3->Elevation");        System.out.println("4->Weight in Vehicle (cargo or passenger)");        System.out.println("5->Speed Preference");        System.out.println("6->towing load");        System.out.println("0->Stop");           }    //substract mpg    public void substract(double ammount){        System.out.println("MPG::"+mpg);        mpg=mpg-ammount;        System.out.println("MPG::"+mpg);    }        //substract mpg    public void add(double ammount){        System.out.println("MPG::"+mpg);        mpg=mpg+ammount;        System.out.println("MPG::"+mpg);    }    public void CityOrDriving(){        System.out.println("Enter \ntrue->City \nfalse->Driving");        System.out.printf("Enter your option::");        boolean option=sc.nextBoolean();        //City Subtracts 2 from MPG        if(option){            substract(2);        }        //Highway Adds 5 to MPG        else{            add(5);        }    }    //Rainy or Sunny    public void RainySunny(){        System.out.println("Enter Rainy or sunny");        System.out.printf("Enter your option::");        String option=sc.next();               //Rainy Subtracts 1 from MPG        if(option.toLowerCase().equals("rainy")){            substract(2);        }        //Sunny No Change to MPG        else if(option.toLowerCase().equals("sunny")){            add(0);        }        else{            System.out.println("Invalid option");        }    }    //Elevation    public void Elevation(){        System.out.println("S for Steep, Steep Subtracts from 5MPG");        System.out.println("H for Hilly, Hilly Subtracts 3 from MPG");        System.out.println("F for Flat, No Change to MPG");        System.out.printf("Enter your option::");        char c=sc.next().toLowerCase().charAt(0);        switch(c){        //S for Steep, Steep Subtracts from 5MPG            case 's':                substract(5);                break;        //H for Hilly, Hilly Subtracts 3 from MPG            case 'h':                substract(3);                break;        //F for Flat, No Change to MPG            case 'f':                add(0);                break;            default:                System.out.println("Invalid option");        }    }    //Weight in Vehicle    public void weightInVenhicle(){        System.out.println();        System.out.println("Each 100lbs subtracts 0.5 MPG");        System.out.printf("Enter weight::");        double weight=sc.nextDouble();        substract((weight/100)*0.5);    }    //SPEED PERFORANCE    public void speed(){               String menu="1 for under speed limit, Add 2 to MPG\n"+                    "2 for at speed limit, No Change to MPG\n"+                    "3 for 5% above speed limit, Subtract 1 from MPG\n"+                    "4 for 10% above speed limit, Subtract 3 from MPG\n"+                    "5 for over 20% above speed limit, Subtract 5 from MPG\n";        System.out.println(menu);        System.out.printf("Enter your option::");        int option=sc.nextInt();        switch(option){                   //1 for under speed limit, Add 2 to MPG            case 1:                add(2);                break;        //2 for at speed limit, No Change to MPG            case 2:                add(0);                break;        //3 for 5% above speed limit, Subtract 1 from MPG            case 3:                substract(1);                break;        //4 for 10% above speed limit, Subtract 3 from MPG            case 4:                substract(3);                break;        //5 for over 20% above speed limit, Subtract 5 from MPG                  case 5:                substract(5);                break;            default:                System.out.println("Invalid option");                break;        }      }    public void towingload(){        //sustract 5 from mpg        substract(5);    }    public static void main(String args[]){        new MPGCalculater();    } }

6 PG::26.0 hoose -City or Highway Driving Rainy or Sunny Elevation Weight in Uehicle <cargo or passenger> -Speed Preference towing load Stop nter ur option ::1 nter rue-City alse->Driving nter your option:true PG::26.0 PG::24.0 hoose -City or Highway Driving Rainy or Sunny Elevation Weight in Uehicle <cargo or passenger> Speed Preference towing load Stop nter ur option::2 nter Rainy oF sunny nter your option:rainy PG::24.0 PG::22.0 hoose -City or Highway Driving Rainy or Sunny Elevation Weight in Uehicle <cargo or passenger> -Speed Preference towing load Stop nter ur option::0 ress any key to continue -. .