1 public class fouth_fomework {
2 final double fire = 1.2;
3 static double last_month;
4 static double this_month;
5 public void setlastmonthpower(double change){
6 this.last_month = change;
7 }
8 public double getlastmonthpower(){
9 return this.last_month;
10 }
11 public void setthismonthpower(double change){
12 this.this_month = change;
13 }
14 public double getthismonthpower() {
15 return this.this_month;
16 }
17 public double compute(double last_month,double this_name){
18 return (this_name-last_month)*fire;
19 }
20 public static void main(String[] args) {
21 fouth_fomework p1 = new fouth_fomework();
22 fouth_fomework p2 = new fouth_fomework();
23 p1.setlastmonthpower(1000);
24 p1.setthismonthpower(1200);
25 p2.setlastmonthpower(1200);
26 p2.setthismonthpower(1450);
27 System.out.println("本月电费为：");
28 System.out.println (p1.compute(p1.getlastmonthpower(),p1.getthismonthpower()));
29 p2.setthismonthpower(1500);
30 System.out.println("本月电费为：");
31 System.out.println(p2.compute(p2.getlastmonthpower(),p2.getthismonthpower()));
32 }
33
34 }
