Sample Input/Output: Please enter the numb er of cars in the experiment: 5 Pleas

ID: 3816933 • Letter: S

Question

Sample Input/Output:

Please enter the number of cars in the experiment: 5

Please enter the information for car 1:

Model: Tahoe

Miles Driven: 127

Gallons Gas used: 10

Please enter the information for car 2:

Model: Jeep

Miles Driven: 198

Gallons Gas used: 12

Please enter the information for car 3:

Model: Blazer

Miles Driven: 223

Gallons Gas used: 15

Please enter the information for car 4:

Model: Yukon

Miles Driven: 225.4

Gallons Gas used: 13.7

Please enter the information for car 5:

Model: Echo

Miles Driven: 150.2

Gallons Gas used: 11.8

Vehicle   Model   Miles driven   Gallons used Miles/gallon   Rating
1 Tahoe   127.0 10.0   12.7   Poor
2   Jeep   198.0     12.0 16.5 Good
3   Blazer 223.015.0   14.9   Good

4 Yukon 225.4 13.7 16.5 Good

5 Echo 150.2 11.8 12.7 Poor

Highest Miles per Gallon: 16.5 miles/gallon

Lowest Miles per Gallon: 12.7 miles/gallon

Explanation / Answer

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

struct VehicleRecord //struct definition
{
    string model;
    double milesDriven;
    double gallons;
    double MPG;
    string MPGRating;
};

int inputVehicles() //input and validate the number of cars
{
     int n;
    cout<<"Please enter the number of cars in the experiment:";
    cin>>n;

    while(n < 0)
    {
        cout<<" Error : Number of vehicles should not be negative. Try again. ";
        cin>>n;
    }

    return n;
}
void readData(struct VehicleRecord vehicle[],int n) //read and validate data for n cars
{
     double milesDriven,gallons;
     int i;
     for(i=0;i<n;i++)
     {
        cout<<" Please enter the information for car "<<i<<":";

        cout<<" Model: ";
        cin>>vehicle[i].model;
        cout<<" Miles Driven: ";
        cin>>milesDriven;
        while(milesDriven <0)
        {
        cout<<" Error : Miles driven should not be negative. Try again. ";
        cin>>milesDriven;
        }
        vehicle[i].milesDriven = milesDriven;
        cout<<" Gallons Gas used:";
        cin>>gallons;
        while(gallons <0)
        {
        cout<<" Error : Gallons of gas should not be negative. Try again. ";
        cin>>gallons;
        }
        vehicle[i].gallons = gallons;
     }
}

void calculateMPG(struct VehicleRecord vehicle[],int n,double *highestMPG,double *lowestMPG)
{

     *highestMPG = 0;
     *lowestMPG = 9999;
     int i;
    for(i=0;i<n;i++)
    {
       vehicle[i].MPG = vehicle[i].milesDriven/vehicle[i].gallons;
       if(vehicle[i].MPG > 13)
       vehicle[i].MPGRating = "Good";
       else
       vehicle[i].MPGRating = "Poor";

       if(vehicle[i].MPG > *highestMPG)
       *highestMPG = vehicle[i].MPG;


       if(vehicle[i].MPG < *lowestMPG)
       *lowestMPG = vehicle[i].MPG;
    }
}
void printData(struct VehicleRecord vehicle[],int n)
{
     int i;
     cout<<" Vehicle Model Miles Driven Gallons Used Miles perGallon Rating";
    for(i=0;i<n;i++)
    {

    cout<<" "<<i<<" "<<vehicle[i].model<<" "<<vehicle[i].milesDriven<<" "<<vehicle[i].gallons<<" "<<vehicle[i].MPG<<" "<<vehicle[i].MPGRating;
    }
}

int main()
{
    struct VehicleRecord vehicle[50];
    int n;
    double highestMPG,lowestMPG;

    n = inputVehicles();

    readData(vehicle,n);

    calculateMPG(vehicle,n,&highestMPG,&lowestMPG);

    cout<<fixed<<setprecision(1);

    printData(vehicle,n);

    cout<<" Highest Miles per Gallon: "<<highestMPG<<" miles/gallon";

    cout<<" Lowest Miles per Gallon: "<<lowestMPG<<" miles/gallon";

   return 0;
}

output: