classPointInPlane.cpp

#include <iostream>

using namespace std;
 
class Point{
    public:
        void Set(double x, double y) ;
        void Move(double x, double y);
        void Rotate();
        double RetrieveHorizontal()const;
        double RetrieveVertical()const;
    private:
        double _x, _y;
};
 
void Point::Set(double x, double y){
    _x=x;
    _y=y;
}
 
void Point::Move(double x, double y){
    _x+=x;
    _y+=y;
}
 
void Point::Rotate(){
    int t;
    t=_x;
    _x=_y;
    _y=-t;
}
 
double Point::RetrieveHorizontal()const{
    return _x;
}
 
double Point::RetrieveVertical()const{
    return _y;
}
 
int main(void) {
    Point point;
    point.Set(0, 5);
    cout << point.RetrieveHorizontal() << " " << point.RetrieveVertical() << endl;
    point.Move(1, 2);
    cout << point.RetrieveHorizontal() << " " << point.RetrieveVertical() << endl;
    for (int i = 0; i < 4; i++) {
        point.Rotate();
        cout << point.RetrieveHorizontal() << " " << point.RetrieveVertical() << endl;
    }
    return 0;
}

Fraction.cpp

#include <iostream>
 
using namespace std;
 
class Fraction{
    public:
        double getDouble();
        void setNumerator(int numerator);
        void setDenominator(int denominator);
        void outputReducedFraction();
    private:
        double _numerator,_denominator;
};
 
double Fraction::getDouble(){
    return _numerator/_denominator;
}
 
void Fraction::outputReducedFraction(){
    int t,a=_numerator,b=_denominator;
    while ( a != 0 ) {
        t = a;
        a = b % a;
        b = t;
    }
    cout << _numerator/b ;
    if(_denominator/b!=1) cout << "/" << _denominator/b;
}
 
void Fraction::setNumerator(int numerator){
    _numerator=numerator;
}
 
void Fraction::setDenominator(int denominator){
    _denominator=denominator;
}
 
 
int main(){
    Fraction f1, f2;
    f1.setNumerator(4);
    f1.setDenominator(2);
    cout << f1.getDouble() << endl;
    f1.outputReducedFraction();
    cout << endl;
    f2.setNumerator(20);
    f2.setDenominator(60);
    cout << f2.getDouble() << endl;
    f2.outputReducedFraction();
    cout << endl;
    return 0;
}