为什么main编译之后这么多错误啊

<img width="1083" height="562" alt="Image" s

<img width="931" height="583" alt="Image" src="https://github.com/user-attachments/assets/bfb6f40c-6415-4f86-8df1-5d9eb5104283" />

rc="https://github.com/user-attachments/assets/d80de75f-8718-42da-8741-ae64f0ec466e" />