如何在 Java 中根据 x 编写数学表达式

Question

I am trying to write a function that parses in 2 numbers eg coefficient 5 and power 3. I want the output response to be 5x^3.

public void Variable(double c, double p)
{
     coefficient = c;
     power = p;
}

public Expression derive() 
{
      System.out.print("Youre term is " + coefficient + "" + Math.pow("x",power));
}

What have I done wrong here? It's not accepting my "x" in the pow function. But I'm not sure how to have a simple letter in there?

Cheers

Answer 1

Math.pow(double a, double b) doesn't accept a string as its first argument. It expects a double for both the base and the exponent. That method is for calculating values based on the base and the exponent supplied.

-> Returns the value of the first argument raised to the power of the second argument.

Instead, what you want to achieve can easily be done without using pow() method.

Just display coefficient + "x ^ " + power to the console.

System.out.print("Your term is " + coefficient + "x^" + power);