Question

【JAVA】一个求图形面积的代码，最后三行报错，求大神指教

class Coircle {
static double pi=3.14;
public void setRadius(double givenRadius){
radius=givenRadius;
}
public double getRadius(){
return radius;
}
public double computerArea(){
return pi*radius*radius;
}
}
class Rectangle{
public void setside(double givenA,double givenB){
sideA=givenA;
sideB=givenB;
}
public double getsideA(){
return sideA;
}
public double getsidesideB(){
return sideB;
}
public double computeArea(){
return sideA*sideB;
}
}
public class TestObject{
public static void main (String [] args){
double totalArea;
Circle circle1=new Circle();
circle.setRadius(4);
Circle circle2=new Circle();
circle2.setRadius(2);
Rectangle rect=new Rectangle(4,8);
double rectArea=rect.computeArea();
double totalArea=circle1.computeArea+circle2.computeArea+rectArea；
System.out.println("图形的面积是：")；
System.out.println(totalArea+"平方米")；
}

}

Answer 1

class Circle {
static double pi=3.14;
private double radius;
public void setRadius(double givenRadius){
radius=givenRadius;
}
public double getRadius(){
return radius;
}
public double computerArea(){
return pi*radius*radius;
}
}
class Rectangle{
private double sideA,sideB;
public void setside(double givenA,double givenB){
sideA=givenA;
sideB=givenB;
}
public double getsideA(){
return sideA;
}
public double getsidesideB(){
return sideB;
}
public double computeArea(){
return sideA*sideB;
}
}
public class TestObject{
public static void main (String [] args){
double totalArea;
Circle circle1=new Circle();
circle1.setRadius(4);
Circle circle2=new Circle();
circle2.setRadius(2);
Rectangle rect=new Rectangle();
rect.setside(4,8);
double rectArea=rect.computeArea();
double totalArea1=circle1.computerArea()+circle2.computerArea()+rect.computeArea();
System.out.println("图形的面积是：");
System.out.println(totalArea1+"平方米");
}

}

Answer 2

在Coircle和Rectangle类中应该分别定义属性private double radius;和private double sideA;

private double sideB;pi可以定义为 private static final double PI=3.1415926;
写程序不能随便写，要知道每一句代码的意思，严格按照格式来，养成好的习惯

追问

谢谢，以后会注意的，刚才已经选了满意答案，不好意思啊，

Answer 3

分号错误.