import ; public class Work8 { public double jiangjin1(double a) { return a * 0.1; } public Double jiangjin2(double a) { double b = jiangjin1(10); return b + (a - 10) * 0.075; } public Double jiangjin3(double a) { double b = jiangjin2(20); return b + (a - 20) * 0.05; } public Double jiangjin4(double a) { double b = jiangjin3(40); return b + (a - 40) * 0.03; } public Double jiangjin5(double a) { double b = jiangjin4(60); return b + (a - 60) * 0.015; } public Double jiangjin6(double a) { double b = jiangjin5(100); return b + (a - 60) * 0.01; } public static void main(String args[]) { Scanner scanner = new Scanner(); ("Please enter the profit count:"); double a = (); Work8 test1=new Work8(); double jiangjin = 0; if (a <= 10) { jiangjin = test1.jiangjin1(a); } if(a<=20 && a>10) { jiangjin=test1.jiangjin2(a); }if(a>20 && a<=40){ jiangjin=test1.jiangjin3(a); }if(a>40 && a<=60) { jiangjin = test1.jiangjin4(a); }if(a>60 && a<=100) { jiangjin = test1.jiangjin5(a); }if(a>100 ) { jiangjin = test1.jiangjin6(a); } (jiangjin); } }