我已经写出了我的代码，但我一直在if personsAge >= 1上收到错误消息。
这是错误：
类型错误＆gt; =＆＃39; str＆＃39;的实例之间不支持和＆＃39; int＆＃39;
每次运行程序时都会发生这种情况。我不确定我做错了什么。非常感谢任何帮助。
这是我的代码：
# Purpose
''' This program classifies a person to a certain group based on their age'''
#=================================================================================
# Initialize variables(used for processing data)
ageGroup =""; #specify data as empty string
personsAge =""; #specify data as float /real
#====================================================================================
# Input Statements
fullName = str(input("<Enter your full name>"));
personsAge = str(input("<Enter your age>"));
#==========================================================================
'''nested if statements to determine a person's age group.'''
# Using the Nested If eliminates the need to check all if statements
# Once the criteria has been met, control is transferred to the statement
# following the last if Statement. However, the IF/ELSE must be aligned in same column
if (personsAge <=1) and (personsAge >0):
ageGroup = "Infant.";
elif (personsAge >=1) and (personsAge <=13):
ageGroup = "Child.";
elif (personsAge >=13) and (personsAge <=20):
ageGroup = "Teenager.";
elif (personsAge >=20):
ageGroup = "Adult.";
#====================================================================================
#Output Statements
print();
print("My name is " + fullName);
print("My age is " + personsAge);
#=================================================================
# Print Age group
print(fullName + "is an " + ageGroup);
print("=" * 80);
#===============================================================================
#End program
答案 0 :(得分：2)
您正在将输入转换为字符串而不是整数。
使用import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.GeneralPath;
import java.awt.geom.Line2D;
import java.awt.geom.Path2D;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
private boolean dragging = false;
private Point anchor;
private Point target;
private Shape fakePath;
private List<Shape> shapes = new ArrayList<>(25);
public TestPane() {
addMouseMotionListener(new MouseAdapter() {
@Override
public void mouseDragged(MouseEvent e) {
dragging = true;
target = new Point(e.getPoint());
repaint();
}
@Override
public void mouseMoved(MouseEvent e) {
if (target != null && anchor != null) {
fakePath = makePath(anchor, e.getPoint(), target);
repaint();
}
}
});
addMouseListener(new MouseAdapter() {
@Override
public void mousePressed(MouseEvent e) {
if (anchor == null) {
target = null;
anchor = new Point(e.getPoint());
}
}
@Override
public void mouseReleased(MouseEvent e) {
dragging = false;
}
@Override
public void mouseClicked(MouseEvent e) {
if (anchor != null && target != null) {
fakePath = null;
shapes.add(makePath(anchor, e.getPoint(), target));
anchor = null;
target = null;
repaint();
}
}
});
}
protected Path2D makePath(Point p1, Point p2, Point p3) {
Path2D p = new GeneralPath();
p.moveTo(p1.getX(), p1.getY());
p.curveTo(p1.getX(), p1.getY(),
p2.getX(), p2.getY(),
p3.getX(), p3.getY());
return p;
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
g2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_ENABLE);
g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);
g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
g2d.setColor(Color.BLACK);
for (Shape shape : shapes) {
g2d.draw(shape);
}
if (anchor != null && target != null) {
g2d.setColor(Color.GREEN);
g2d.draw(new Line2D.Double(anchor, target));
}
if (fakePath != null) {
g2d.setColor(Color.BLUE);
g2d.draw(fakePath);
}
g2d.dispose();
}
}
}
转换您的输入：
int()然后你就可以将它与其他整数进行比较。
每次将personsAge = int(input("<Enter your age>"));
与字符串连接时，请不要忘记将personsAge整数转换为带str()的字符串。例如：
personsAge最好在不保证用户输入属于所需类型的情况下添加错误处理。例如：
print("My age is " + str(personsAge));