java - 递归程序中的错误

Question

我有以下程序应该正在运行，但它没有运行。教授把它交给我们来使用。它旨在计算阶乘。它甚至不让我编译。我收到的错误状态

  Multiple markers at this line     - Syntax error on token "Invalid Character", invalid Expression     - Syntax error on tokens, delete these tokens

This is in reference to the following line:

 System.out.print ( “%d! = %d\n”, counter, factorial (counter ));

我该如何解决这个问题？我以前写过很多程序，但以前从未在引号中见过模数运算符。我有点困惑!下面贴出整个程序!谢谢!

public class FactorialTest
{
    // calculate the factorial of 0 – 15
    public static void main ( String args[] )
    {
        FactorialCalculation factorialCalculation = new FactorialCalculation();
        factorialCalculation.displayFactorials();
    }  // end of main
}  // end of the class FactorialTest


public class FactorialCalculation
{
    //recursive Factorial method
    public long factorial(long number)
    {
        if (number  <= 1)
            return 1;
        else
            return number * factorial (number - 1);
    }
    //Now output the factorials of 0 through 15
    public void displayFactorials()
    {
        // Calculate the factorial of o through 15
        for ( int counter = 0; counter <= 10; counter++ )
            System.out.print ( “%d! = %d\n”, counter, factorial (counter ));
    } // end of the method displayFactorials
}  // end of class FactorialCalculation

Answer 1

你有这个:

“%d! = %d\n”

“和”花哨的引号字符在 Java 中不是有效的引号字符。使用普通的旧 "代替。

如果您的编辑器自动为您创建精美的引号，请禁用该功能或​​找到更合适的编辑器。