Create class to get the Gas Mileage - C++ Class

C++ examples for Class:Class Creation

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Description

Create class to get the Gas Mileage

Demo Code

                         
#include <iostream>
                         /*from   w  w  w. j  ava  2  s . co  m*/
class Car {
 private:
    double milesDriven = 0.0f;
    double gallonsUsed = 0.0f;
    double tripMPG = 0.0f;
    double totalMPG = 0.0f;
                         
 public:
    Car();
                         
    // SETTERS
    void setMilesDriven();
    void setGallonsUsed();
    void setTripMPG();
    void setTotalMPG();
                         
    // GETTERS
    double getMilesDriven();
    double getGallonsUsed();
    double getTripMPG();
    double getTotalMPG();
                         
    void run();
};
                         
Car::Car() {}
                         
// SETTERS
void Car::setMilesDriven() {
    milesDriven = 0.0f;
                         
    std::cout << "Enter miles driven (-1 to quit): ";
    std::cin >> milesDriven;
}
void Car::setGallonsUsed() {
    gallonsUsed = 0.0f;
                         
    std::cout << "Enter gallons used: ";
    std::cin >> gallonsUsed;
}
void Car::setTripMPG() {
    tripMPG = 0.0f;
                         
    tripMPG = (getMilesDriven() / getGallonsUsed());
}
void Car::setTotalMPG() { totalMPG += getTripMPG(); }
                         
// GETTERS
double Car::getMilesDriven() { return milesDriven; }
double Car::getGallonsUsed() { return gallonsUsed; }
double Car::getTripMPG() { return tripMPG; }
double Car::getTotalMPG() { return totalMPG; }
                         
void Car::run() {
    setMilesDriven();
                         
    if (getMilesDriven() != -1) {
        setGallonsUsed();
        setTripMPG();
        setTotalMPG();
                         
        std::cout << "MPG this trip: " << getTripMPG() << std::endl;
        std::cout << "Total MPG: " << getTotalMPG() << std::endl;
    }
}
                         
int main(int argc, const char *argv[]) {
    Car gm;
                         
    while (gm.getMilesDriven() != -1) {
        gm.run();
    }
                         
    return 0;
}

Result


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