java - 使用数组执行计算

Question

我有一个关于如何使用数组执行计算的问题。就我而言，我需要执行数组的计算，然后在 main 方法中调用它。我在返回类型中进行了计算，编译器提示 double 无法转换为 double[]，所以我尝试获取数组的长度，但仍然收到相同的警告。我怎样才能解决这个问题？任何帮助将不胜感激。下面是我的代码:

// calcGravity returns an array of doubles containing teh gravity values
//and takes two arrays of doubles as parameters for the radius values and mass
public static double[] calcGravity(double[] radius, double[] mass)
{
    // fill in code here
        return (6.67E-17) * mass.length / Math.pow(radius.length, 2);
    // The formula to calculate gravity is:
    // 6.67E-17 times the massOfPlanet divided by the radius of the planet squared
}

Answer 1

public static double[] calcGravity(double[] radius, double[] mass)
{
    double[] ret = new double[radius.length];
    for (int i=0;i<radius.length;i++) {
      // fill in code here
      ret[i] = (6.67E-17) * mass[i] / Math.pow(radius[i], 2);
      // The formula to calculate gravity is:
      // 6.67E-17 times the massOfPlanet divided by the radius of the planet squared
   }
   return ret;
}