diff --git a/lab1/2.cpp b/lab1/2.cpp
new file mode 100644
index 0000000..01f7c91
--- /dev/null
+++ b/lab1/2.cpp
@@ -0,0 +1,80 @@
+#include <cmath>
+#include <iostream>
+#include <GL/glut.h>
+
+// 窗口宽度和高度
+const int WIDTH = 640;
+const int HEIGHT = 480;
+
+void drawDDALine(int x1, int y1, int x2, int y2) {
+    float x = x1;
+    float y = y1;
+
+    // 计算差值
+    int dx = x2 - x1;
+    int dy = y2 - y1;
+
+    // 确定步数，取 dx 和 dy 中绝对值较大的那个
+    int steps = std::abs(dx) > std::abs(dy) ? std::abs(dx) : std::abs(dy);
+
+    // 计算每一步的增量
+    float xIncrement = (float)dx / steps;
+    float yIncrement = (float)dy / steps;
+
+    // 开始绘制点
+    glBegin(GL_POINTS);
+    glVertex2i((int)round(x), (int)round(y)); // 绘制起点
+
+    for (int k = 0; k < steps; k++) {
+        x += xIncrement;
+        y += yIncrement;
+        // 将浮点坐标四舍五入转换为整数像素坐标
+		std::cout << (int)round(x) << ", " << (int)round(y)<<"\n";
+        glVertex2i((int)round(x), (int)round(y));
+    }
+    glEnd();
+}
+
+// 显示回调函数
+void display() {
+    drawDDALine(0, 0, 50, 20);
+    glFlush();
+}
+
+// 初始化 OpenGL 设置
+void init() {
+    // 设置背景颜色为白色
+    glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
+
+    // 设置投影矩阵为 2D 正交投影
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    // 定义可视区域，左下角(0,0)，右上角(WIDTH, HEIGHT)
+    gluOrtho2D(0.0, WIDTH, 0.0, HEIGHT);
+}
+
+int main(int argc, char** argv) {
+    // 初始化 GLUT
+    glutInit(&argc, argv);
+
+    // 设置显示模式：单缓冲、RGB 颜色模式
+    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
+
+    // 设置窗口大小和位置
+    glutInitWindowSize(WIDTH, HEIGHT);
+    glutInitWindowPosition(100, 100);
+
+    // 创建窗口
+    glutCreateWindow("DDA算法");
+
+    // 注册回调函数
+    glutDisplayFunc(display);
+
+    // 初始化设置
+    init();
+
+    // 进入主循环
+    glutMainLoop();
+
+    return 0;
+}
\ No newline at end of file
diff --git a/lab1/2.exe b/lab1/2.exe
new file mode 100644
index 0000000..e6348df
Binary files /dev/null and b/lab1/2.exe differ