主题：[推荐]Java授课视频第六课：面向对象——封装之一

//分数类

class FS {
        private int fz=1;
        private int fm=1;

        public FS() {

        }

        public FS(int fz, int fm) {
                setFS(fz, fm);
        }

        public int getFz() {
                return fz;
        }

        public void setFz(int fz) {
                this.fz = fz;
        }

        public int getFm() {
                return fm;
        }

        public void setFm(int fm) {
                if (fm != 0)
                        this.fm = fm;
                else
                        fm = 1;
        }

        public void setFS(int fz, int fm) {
                setFz(fz);
                setFm(fm);
        }

        public String toString() {
                return fz + "/" + fm;
        }

}

public class Exec {
        public static void main(String[] args) {
                FS fs = new FS();
                fs.setFz(2);
                fs.setFm(3);
                System.out.println(fs);
        }
}