Cannot make a static reference to the non-static field *
和
Cannot make a static reference to the non-static method *
public class Cerchio{
float r;
float area;
float cfr;
final double pi = 3.14;
public static void main(String[] args){
System.out.println("CIRCLE PROGRAM/n");
r = 5;
c_cfr();
c_area();
System.out.ptintln("The cir is: " + cfr);
System.out.println("The area is: " + area);
}
float c_cfr(){
cfr =(float)(2 * pi * r); //casting
return cfr;
}
float c_area(){
area = (float)(pi * (r*r));
return area;
}
}
你能给我一些建议吗?
我正在使用Android上的SandIDE进行编码
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