这段JAVA程序怎么得不到与想的结果啊 ? 请高手赐教
来源:百度知道 编辑:UC知道 时间:2024/05/21 19:57:18
import java.io.*;
class Circle
{
double radius;
public Circle()
{
radius = 0;
}
public Circle(double r)
{
radius = r;
}
double getRadius()
{
return radius;
}
double getPerimeter()
{
return 2*radius*Math.PI;
}
double getArea()
{
return Math.PI*radius*radius;
}
void disp()
{
System.out.println ("圆的半径是"+radius+"周长是"+2*radius*Math.PI+"面积是"+Math.PI*radius*radius);
}
}
class t
{
public static void main(String []args)throws IOException
{
BufferedReader str = new BufferedReader(
new InputStreamReader(System.in));
System.out.println ("enter the radius");
str.readLine();
double r = Double.parseDouble(str.readLine()
class Circle
{
double radius;
public Circle()
{
radius = 0;
}
public Circle(double r)
{
radius = r;
}
double getRadius()
{
return radius;
}
double getPerimeter()
{
return 2*radius*Math.PI;
}
double getArea()
{
return Math.PI*radius*radius;
}
void disp()
{
System.out.println ("圆的半径是"+radius+"周长是"+2*radius*Math.PI+"面积是"+Math.PI*radius*radius);
}
}
class t
{
public static void main(String []args)throws IOException
{
BufferedReader str = new BufferedReader(
new InputStreamReader(System.in));
System.out.println ("enter the radius");
str.readLine();
double r = Double.parseDouble(str.readLine()
import java.io.*;
class Circle
{
double radius;
public Circle()
{
radius = 0;
}
public Circle(double r)
{
radius = r;
}
double getRadius()
{
return radius;
}
double getPerimeter()
{
return 2*radius*Math.PI;
}
double getArea()
{
return Math.PI*radius*radius;
}
void disp()
{
System.out.println ("圆的半径是"+radius+"周长是"+2*radius*Math.PI+"面积是"+Math.PI*radius*radius);
}
}
class Try
{
public static void main(String []args)throws IOException
{
BufferedReader str = new BufferedReader(
new InputStreamReader(System.in));
System.out.println ("enter the radius");
//str.readLine(); //这句去掉
double r = Double.parseDouble(str.readLine());
Circle c = new Circle(r); <