这是个根据三角形三边求面积的程序 大家能否帮我看看 这里sideA,sideB,sideC有必要设为类变量吗？

Question

import java.util.;
class Triangle{
static double sideA,sideB,sideC;
double getArea(){
double p=0.5(sideA+sideB+sideC);
double area=Math.sqrt(p*(p-sideA)(p-sideB)(p-sideC));
return area;
}
void setSide(double a,double b,double c){
sideA=a;
sideB=b;
sideC=c;
}
}
public class Test {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Triangle tri = new Triangle();
System.out.print("请输入三角形的三边长：");
double a = sc.nextDouble();
double b = sc.nextDouble();
double c = sc.nextDouble();
tri.setSide(a,b,c);
System.out.print("该三角形的面积为：" + tri.getArea());
}
}

Answer 1

没必要