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turtle绘制在Python中使用turtle库绘制五角星。需要注意的是，turtle的坐标系原点在窗口中心，x轴的正方向向右，y轴的正方向向上。以下是代码示例： import turtleturtle.color('red')def get_points(x, y, length): return [ (x, y), (x + length, y), (x, y - length), (x + length/2, y + length/2), (x + length, y + length) ]def main(): for p in get_points(0, 0, 100): turtle.goto(p[0], p[1]) turtle.goto(0, 0)main()turtle.done() 可以通过上述代码绘制出如图所示的五角星图形。
- easyX绘制在C++中使用easyX库绘制五角星。此处需要注意的是，easyX的图形坐标系原点位于窗口的左上角，x轴的正方向向右，y轴的正方向向下。以下是代码示例：
#include #include #include namespace zsl { class Point { private: int x; int y; public: Point(int x, int y) { this->x = x; this->y = y; } Point to_offset(int dx, int dy) { return Point(this->x + dx, this->y + dy); } };}std::vector getPoints(zsl::Point p, int length) { std::vector pointList = { p, p.to_offset(length, 0), p.to_offset(0, length), p.to_offset(length/2, -length/2), p.to_offset(length, length), p }; return pointList;}int main() { initgraph(600, 600); setlinecolor(RED); zsl::Point start(200, 200); std::vector points = getPoints(start, 100); for (int i = 1; i < points.size(); i++) { zsl::Point lastPoint = points[i-1]; zsl::Point currentPoint = points[i]; line(lastPoint.x, lastPoint.y, currentPoint.x, currentPoint.y); } int a; std::cin >> a; closegraph(); return 0;}
通过上述代码可以绘制出与示意图类似的五角星图形。
- Swing绘制在Java Swing框架中绘制五角星的代码示例如下：
package com.demo.draws;import javax.swing.*;import java.awt.*;import java.util.Arrays;public class Draw extends JFrame { public class Plot extends JPanel { private List xCoordinates; private List yCoordinates; public Plot(List points) { this.points = points; } public void paint(Graphics graphics) { super.paint(graphics); Graphics2D g2d = (Graphics2D) graphics; g2d.setColor(Color.RED); for (int i = 1; i < points.size(); i++) { g2d.drawLine( points.get(i-1)[0], points.get(i-1)[1], points.get(i)[0], points.get(i)[1] ); } BasicStroke basicStroke = new BasicStroke(10.1f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_BEVEL); g2d.setStroke(basicStroke); } } public List getPoints(int x, int y, int length) { return Arrays.asList( Arrays.asList(x, y), Arrays.asList(x+length, y), Arrays.asList(x, y+length), Arrays.asList(x+length/2, y-length/2), Arrays.asList(x+length, y+length), Arrays.asList(x, y) ); } public Draw() { super(); init(); } public void init() { this.setSize(600, 600); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setContentPane(new Plot(getPoints(200, 200, 100))); this.setTitle("绘图"); this.setLocationRelativeTo(null); this.setVisible(true); } public static void main(String[] args) { new Draw(); }} 通过以上代码可以在swing组件中绘制出与示意图一致的五角星图形。
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