第23行和24行哪个 r.a * this.b + r.b*this.a是咋回事，为啥有r.a还有this.
- import java.util.Scanner;
- public class Main {
- public static void main(String[] args) {
- Scanner in = new Scanner(System.in);
- Fraction a = new Fraction(in.nextInt(), in.nextInt());
- Fraction b = new Fraction(in.nextInt(),in.nextInt());
- a.print();
- b.print();
- a.plus(b).print();
- }
- }
- class Fraction{
-
- private int a;
- private int b;
-
- public Fraction(int a,int b){
- this.a = a;
- this.b = b;
- }
-
- public Fraction plus(Fraction r){
- int n = r.a * this.b + r.b*this.a;
- int fm = r.b * b;
- return new Fraction(n,fm);
- }
- public void print(){
- int t = getReduce(a,b);
- int fz = a/t;
- int fm = b/t;
- if(fm==fz)
- System.out.println(fm/fz);
- else
- System.out.println(fz+"/"+fm);
- }
- }
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