public class TestCircle{
private static float r;//半径
private static final float PI = 3.14;
//求周长
public static float getCir(){
return 2*PI*r;
}
//求面积
public static float getAre(){
return PI*r*r;
}
public static void mian(String[] args){
//输入一个半径值
Scanner scan = new Scanner(System.in);
r = scan.nextFloat();
//打印周长
System.out.println("周长:"+getgetCir());
//打印面积
System.out.println("面积:"+getgetAre());
}
}
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