ADD file via upload

main.cpp

@@ -0,0 +1,16 @@
+#include "car.h"
+
+int main()
+{
+    Driver driver{"老王"};
+    Tyre tyre{"倍耐力"};
+    Car car1{tyre, driver};
+    car1.print(); // 正常
+
+    // 演示聚合可能的问题
+    Driver *temp = new Driver{"临时"}; // 动态申请的司机对象
+    Car car2{tyre, *temp};
+    car2.print(); // 正常
+    delete temp;  // 释放司机对象
+    car2.print(); // 触发未定义行为
+}