2.定义分数类,包括分子和分母变量、构造方法、 加减乘除方法、化简方法、值计算方法和显示分子和分母的方法。 然后编写一个主类,在其主方法中通过定义两个分数对象来 显示每一个分数的分子值、分母值、化简和值, 显示两个分数加减乘除结果。
package chapter2;public class demo2 {
public static void main(String[] args) {
Fengshu f1=new Fengshu(12,18);
Fengshu f2=new Fengshu(1,6);
f1.show();
f1.yuefeng();
f1.show();
Fengshu f3=Fengshu.jia(f1,f2);
f3.show();
f3=Fengshu.jian(f1,f2);
f3.show();
f3=Fengshu.cheng(f1,f2);
f3.show();
f3=Fengshu.chu(f1,f2);
f3.show();
}
}class Fengshu {
int a,b;
public Fengshu(int a, int b) {
this.a=a;
this.b=b;
}
public void yuefeng() {
int a1=this.a;
int b1=this.b;
while(b1 != 0){
int temp = a1 % b1;
a1 = b1;
b1 = temp;
}
this.a=a/a1;
this.b=b/a1;
}
public static Fengshu jia(Fengshu x,Fengshu y) {
int ansa,ansb;
ansa=x.a*y.b+x.b*y.a;
ansb=x.b*y.b;
Fengshu ans=new Fengshu(ansa,ansb);
return ans;
} public static Fengshu jian(Fengshu x,Fengshu y) {
int ansa,ansb;
ansa=x.a*y.b-x.b*y.a;
ansb=x.b*y.b;
Fengshu ans=new Fengshu(ansa,ansb);
return ans;
} public static Fengshu cheng(Fengshu x,Fengshu y) {
int ansa,ansb;
ansa=x.a*y.a;
ansb=x.b*y.b;
Fengshu ans=new Fengshu(ansa,ansb);
return ans;
} public static Fengshu chu(Fengshu x,Fengshu y) {
int ansa,ansb;
ansa=x.a*y.b;
ansb=x.b*y.a;
Fengshu ans=new Fengshu(ansa,ansb);
return ans;
} public void show() {
System.out.println(a+"/"+b);
}
}