摘要： ![sicp每日一题[2.51]](https://img2024.cnblogs.com/blog/3223467/202410/3223467-20241021084646832-998666087.png)
Exercise2.51 Define the below operation for painters. below takes two painters as arguments. The resulting painter, given a frame, draws with the firs 阅读全文
Exercise2.51 Define the below operation for painters. below takes two painters as arguments. The resulting painter, given a frame, draws with the firs 阅读全文