java - 从 Java 中的方法返回 double /整数？

Question

我正在尝试编写接受一组数字的代码，通过二次公式运行它们并返回然后打印的答案。

附注我是java新手，这样做是为了学习。

Scanner firstCoeff = new Scanner(System.in);
int ax = firstCoeff.nextInt();
firstCoeff.close();
Scanner secCoeff = new Scanner(System.in);
int bx = secCoeff.nextInt();
secCoeff.close();
Scanner finConstant = new Scanner(System.in);
int c = finConstant.nextInt();

Quadratic_Formula work = new Quadratic_Formula();
work.posquadForm(ax, bx, c);
work.negquadForm(ax, bx, c);

System.out.println("Your answer is" + work.posquadForm() +"or" + work.negquadForm() +".");

这是公式类:

public class Quadratic_Formula {
public double posquadForm(int ax, int bx, int c) {
    int b;
    b = (bx);
    int a;
    a = (ax);

    double posanswer;
    posanswer = ((-b) - Math.sqrt((b^2) + ((-4) * a * c)) / (2 * a));
    return posanswer;
}
public double negquadForm(int ax, int bx, int c) {
    int b;
    b = (bx);
    int a;
    a = (ax);

    double neganswer;
    neganswer = ((-b) + Math.sqrt((b^2) + ((-4) * a * c)) / (2 * a));
    return neganswer;
}

Answer 1

更改为

Quadratic_Formula work = new Quadratic_Formula();
double posAnswer = work.posquadForm(ax, bx, c);
double negAnswer = work.negquadForm(ax, bx, c);

System.out.println("Your answer is" +posAnswer  +"or" + negAnswer  +".");

您的函数 posquadForm 和 negquadForm 已经计算出答案，您只需将它们存储在变量中并打印出来？