PDF-Subroutines in C

Lecture 23 Todayx2019s Goals x2022 Use multiple files to write a C program x2022 Share variables and labels between assembly files x2022 Discuss how to pass parameters to C functions . Style: Main program and subroutines. INF 123 – Software architecture. tdebeauv@uci.edu. 1. Outline. Some theory. Connector 1: Procedure . call . Style: Main program and subroutines. Connector 2: Socket. Subroutines . and Stacks. 1. Subroutines. Separate, independent module of program, performs a specific task. shortens code, provide reusable “tools”. High-level languages typically have libraries of subroutines.. CP212. Winter 2012. Topics. Subroutines. Functions. Modular programming. 3 Main Benefits. Variable and Subroutine Scope. Using and Passing Parameters. Module level "Global" variables. Passing arrays. Answer. 1. What does a connector do?. 2. Can connectors be smart? complex? domain-specific?. 3. Name 2 connectors. 4. Can subroutines have side-effects? Can they call each other?. 5. def. . concat. (. Lecture 7: Subroutines and stack framesParameter passing though the stackAn exampleLocal variables and the stack frameand ULNK instructionsParameter passing through stack framesAn exampleThe need for 1 Introduction include a new diagnostics. Summary. Step 1: name and create the new diagnostics;. Step 2: modify run_diagnostics.ncl to load the new diagnostic;. Step 3: modify ILAMB_PARA_SETUP to show up the new diagnostic;. Call . suba. Call . suba. Call . suba. Next instruction. Next instruction. Next instruction. Start of subroutine. Subroutine . suba. Jump back. Only one copy of the code is placed in memory. Whenever we wish to use the code, a jump is made to it . CS. . 111. On-Line MS Program. Operating . Systems . Peter Reiher. . Introduction. Most useful abstractions an OS wants to offer can’t be directly realized by hardware. The hardware doesn’t do exactly what the abstraction requires. Functions. & . Subroutines. (. procedures. in other languages) are subprograms that allow modular coding. Function. : returns a single explicit function value for given function arguments. Subroutine. uses . a language . to implement all of the functional capability of the application.. VBA . (Visual Basic for Applications. ). . is that language.. Use VBA to tell Excel what to do:. C. reate your own new functions. Example: Our function to find the largest element of an array might be re-used in many different programs. A . subroutine. allows us to write that functionality in an . abstract way. so that we, or others, can re-use it without modification. Christoffer H. Grindheim. 1. Content. Current code. New code. Design objectives. 2. Current Code. Nrstuff. Numeric functions and subroutines. Long_v2. Functions and subroutines for time space, and conversion to phase space . suba. Call . suba. Next instruction. Next instruction. Next instruction. Start of subroutine. Subroutine . suba. Jump back. Only one copy of the code is placed in memory. Whenever we wish to use the code, a jump is made to it .