package text.java;
import java.util.StringTokenizer;
public class fenshu {
    int fenzi,fenmu;
    char ch;

    public fenshu(String str) {
        StringTokenizer st=new StringTokenizer(str,"/",true);
        this.fenzi = Integer.parseInt(st.nextToken());
        this.ch=st.nextToken().charAt(0);
        this.fenmu = Integer.parseInt(st.nextToken());
    }

    public fenshu yuefen(int fz,int fm){
        int i;

        for (i=2;i<=fz&&i<=fm;i++){
            if(fz%i==0&&fm%i==0){
                fz=fz/i;
                fm=fm/i;
            }
        }

        fenshu result=new fenshu(fz+"/"+fm);
        return result;
    }

    public fenshu getJia(fenshu x){
        int newFenmu=this.fenmu*x.fenmu;
        int newFenzi=fenzi*x.fenmu+x.fenzi*fenmu;
        return yuefen(newFenzi,newFenmu);
    }

    public fenshu getJian(fenshu x){
        int newFenmu=fenmu*x.fenmu;
        int newFenzi=fenzi*x.fenmu-x.fenzi*fenmu;
        return yuefen(newFenzi,newFenmu);
    }

    public fenshu getCheng(fenshu x){
        int newFenmu=fenmu*x.fenmu;
        int newFenzi=fenzi*x.fenzi;
        return yuefen(newFenzi,newFenmu);
    }

    public fenshu getChu(fenshu x){
        int newFenmu=fenmu*x.fenzi;
        int newFenzi=fenzi*x.fenmu;
        return yuefen(newFenzi,newFenmu);
    }

    @Override
    public String toString() {
        return fenzi + "/" + fenmu;
    }

}