Cornell University Programming Language: Difference between revisions

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'''Cornell University Programming Language''' (also called '''CUPL''') is a procedural computer programming language developed at [[Cornell University]] in the late 1960s.

{{primary sources|date=October 2011}}

'''Cornell University Programming Language''' (also called '''CUPL''') is a procedural computer programming language developed at [[Cornell University]] in the late 1960s.

CUPL was based on an earlier Cornell-developed programming language, [[CORC]]. It was used to teach introductory computer programming classes.<ref>{{cite newspaper |newspaper=[[The New York Times]]

|url=https://bits.blogs.nytimes.com/2008/11/18/teaching-everyone-to-speak-big-blue

|title=Teaching Everyone to Speak Big Blue

|quote=- I taught myself Cornell's own student language, CUPL

|author1=Ashlee Vance |author2=Jeff Broido |date=November 18, 2008}}

CUPL was developed by R. W. Conway,<ref name=CUPL.Conway>{{cite web

CUPL was developed by R. W. Conway, W. L. Maxwell, G. Blomgren, Howard Elder, H. Morgan, C. Pottle, W. Riddle, and Robert Walker. CUPL had a very simple syntax similar to [[BASIC]] and to [[PL/I]]. The processor was designed to offer extensive error correction and diagnostic capabilities. This would allow student programs to execute even if they contained minor syntax errors. The compiler also included spelling correction capabilities so that if a variable name is referenced only once, the compiler would assume that it was a misspelling of some other intended name.

|url=https://ecommons.cornell.edu/handle/1813/40564?show=full

|title=A Conversation with Richard W. Conway

CUPL was developed by|author=David R.Gries W. Conway,|date=2015-07-31}}</ref> W. L. Maxwell, G. Blomgren, Howard Elder, H. Morgan, C. Pottle, W. Riddle, and Robert Walker. CUPL had a very simple syntax similar to [[BASIC]] and to [[PL/I]]. The processor was designed to offer extensive error correction and diagnostic capabilities. This would allow student programs to execute even if they contained minor syntax errors. The compiler also included spelling correction capabilities so that if a variable name is referenced only once, the compiler would assume that it was a misspelling of some other intended name.

CUPL also offered an extensive set of matrix operations and offered dynamic run-time memory allocation. At the time, Cornell's computer was an IBM System 360 Model 40 batch processing system with only 64K of core memory. CUPL was able to process a large batch of student programs quickly by remaining resident in core memory, but the compiler occupied 58K of memory, leaving only a small amount for the program code and variable storage.<ref>{{cite web|url=http://ecommons.library.cornell.edu/handle/1813/5881|title=CUPL - An Approach to Introductory Computing Instruction|page=19|date=January 1968|publisher=Computer Science Technical Reports (68-4)|accessdate=2013-12-14}}</ref>

==Derivative projects==