The document describes a generic arithmetic system that allows uniform access to number packages with different data representations. It defines generic arithmetic procedures like add, sub, mul, and div that apply the corresponding operation for the specific number package. A scheme-number package for integer arithmetic is also installed. Generic tags are attached to values to identify their representation, and a mapping table is used to dispatch operations to appropriate handler procedures based on tags.

1. SICP

2.
2.5

3. 일반화된

4. 연산

5. 시스템
cecil

6. 한

7. 데이터의

8. 표현이

9. 서로

10. 다를

11. 때는

12. 물론이고,

13. 아예

14. 인자의

15.
종류가

16. 다른

17. 경우라도

18. 이를

19. 모두

20. 처리하는

21. 연산을

22. 정의

23. packages to be accessed uniformly by programs that use numbers. Any
individual arithmetic package (such as the complex package) may itself be
accessed through generic procedures (such as add-complex) that combine
packages designed for different representations (such as rectangular and
polar). Moreover, the structure of the system is additive, so that one can
design the individual 일반화된arithmetic packages

24. 산술separately

25. 연산
and combine them
to produce a generic arithmetic system.
Figure 2.23: Generic arithmetic system.