Question

NetBeans IDE不断发出错误，说它无法找到符号IO。由于“IO”被视为符号，因此无法对IO执行任何输入或输出操作。无法弄清楚为什么会这样。

这是我试图运行的非常简单的程序： -

public class CourseGrade
{
    public static void main(String[] args)
    {
        int examWeight = 70;    // Percentage weight given to examination
        int labWeight = 20;     // Percentage weight given to lab work
        int hwWeight = 10;      // Percentage weight given to homework 
                                                              assignment
        double examScore;       // Examination score obtained by student
        double labScore;        // Lab score obtained by student
        double hwScore;         // Homework score obtained by student
        double finalGrade;      // Final grade obtained by student

        // Ask student to input scores for exam, lab and nomework
        IO.output("Enter your exam grade: ");
        examScore = IO.inputDouble( );
        IO.output("Enter your lab grade: ");
        labScore = IO.inputDouble( );
        IO.output("Enter your homework grade: ");
        hwScore = IO.inputDouble( );

        // Computer final grade as the weighted sum of exam, lab and 
                                                     homework scores
        examScore = examScore * (examWeight / 100.0);
        labScore = labScore * (labWeight / 100.0);
        hwScore = hwScore * (hwWeight / 100.0);
        finalGrade = examScore + labScore + hwScore;

        // Output the final grade
        IO.outputln("Your final grade is " + finalGrade);  

    }
}

这是我得到的错误： -

错误：找不到符号

IO.output（“输入考试分数： - \ n”）;

符号：变量IO

location：class CourseGrade

我为每个使用过的IO获得了此输出。造成这种情况的原因是什么？

NetBeans无法执行IO操作

0 个答案: