Question

C++ Homework

Class DoubleTrouble contains a static integer member called howMuch. Write the class definition and implementation code that initializes howMuch, increments howMuch each time an object of the DoubleTrouble type is constructed, and decrements howMuch each time an object of the DoubleTrouble type is destroyed

Answer 1

#include <iostream>

using namespace std;

class DoubleTrouble {
private:
    static int howMuch;
public:
    DoubleTrouble() {
        howMuch++;
    }

    ~DoubleTrouble() {
        howMuch--;
    }

    static int getHowMuch() {
        return howMuch;
    }
};

int DoubleTrouble::howMuch = 0;

void createObjects() {
    DoubleTrouble t3;
    cout << DoubleTrouble::getHowMuch() << endl;
}

int main() {
    DoubleTrouble t1, t2;
    cout << DoubleTrouble::getHowMuch() << endl;
    createObjects();
    cout << DoubleTrouble::getHowMuch() << endl;
    return 0;
}