Question

我正在尝试解决作业：我需要编写一个程序，根据两个输入计算梯子的长度，即要达到的所需高度以及将梯子靠近墙壁所产生的角度

我使用以下公式将度数转换为弧度：

radians = (math.pi / 180) * x # x is the given angle by the user.

我也导入了数学库以使用它的功能。

def main():

    import math 

    print("this program calculates the length of a ladder after you give the height and the angle")

    h = eval(input("enter the height you want to reach using the ladder"))
    x = eval(input("enter the angle which will be created be leaning the ladder to the wall"))

    radians = ( math.pi / 180 ) * x

    length = h / math.sin(x)

    print("the length is:", length)


main()

我究竟做错了什么？我知道代码遗漏了一些东西，如果有人可以帮助我填补空白，我会很感激。

Answer 1

计算后你从未使用radians。

即。 length = h / math.sin(radians)

Answer 2

要让crickt_007的答案绝对清楚：radians你计算之后没用过的length = h / math.sin(radians)应该是正弦的参数：

package management;

import javax.swing.*;
import java.awt.*;

public class Library extends JFrame {
    JFrame frame = new JFrame();
    JPanel panel = new JPanel();
    JLabel label1 = new JLabel();
    JLabel label3 = new JLabel();
    JLabel label2 = new JLabel();

    Library() {
        super("WELCOME TO KCA LIBRARY");

        setLayout(new FlowLayout());
        setBounds(500,500,500,500);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        Container con = this.getContentPane();
        con.add(panel);

        panel.setLayout(null);

        label1=new JLabel("USERNAME");
        label1.setToolTipText("Enter Your Username");

        label2=new JLabel("REGISTRATION NUMBER");
        label2.setToolTipText("Enter Your Registration no");
        label2.setVerticalTextPosition(JLabel.BOTTOM);

        label3 = new JLabel("PASSWORD");
        label3.setToolTipText("Enter Your Password");

        add(label1);
        add(label2);
        add(label3);

        setVisible(true);  
    }

    public static void main(String[]args) {
        new Library();
    }
}

Answer 3

你计算radians，没关系，但问题是你从未使用radians值。我认为你的代码必须改变如下：）

def main():

    import math 

    print("this program calculates the length of a ladder after you give the height and the angle")

    h = eval(input("enter the height you want to reach using the ladder"))
    x = eval(input("enter the angle which will be created be leaning the ladder to the wall"))

    radians = ( math.pi / 180 ) * x

    length = h / math.sin(radians)

    print("the length is:", length)


main()

如果您的输入都是5，则输出为the length is: 57.36856622834928

三角学：sin（x）得到负值

3 个答案: