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ser334_module_cp3_exercise_sample.lyx
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ser334_module_cp3_exercise_sample.lyx
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#LyX 2.3 created this file. For more info see http://www.lyx.org/
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Arizona State University
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SER334: Operating Systems & System Programming
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\noindent
Lecturer Acuna (4), UGTA Lisonbee (3)
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Revised 1/29/2024
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Unit 3 Sample Problems - C Programming III
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In this sample problem set, we will practice advanced concepts in the C
programming language.
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Length: 50 minutes with discussion.
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\begin_layout Itemize
Questions: Q2, Q4-Q6.
Overview Q3.
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Learning Objectives:
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Understand how the preprocessor works in C.
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name "lo_preprocessor"
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Apply multiple source files, the preprocessor, and the linker to construct
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Apply procedural programming techniques to perform object-oriented programming.
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name "lo_oopinc"
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Apply a file format specification and a file I/O library to read and write
binary files.
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name "lo_binaryfiles"
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\begin_inset Formula $\;\;\,\;$
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The Preprocessor
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[Lisonbee] Below is some partially implemented C code.
Using it as a template, create macros based on the instructions given in
the comments.
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// result of AMOUNT_1 minus AMOUNT_2.
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#define
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#if ( )
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//If this condition is true, define a macro called OUTPUT and assign
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//it a value of 1.
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#define
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//If this condition is false, define a macro called OUTPUT and assign
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//it a value of 0.
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#define
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Ans: [Lisonbee]
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// Create a macros AMOUNT_1 and AMOUNT_2, and assign them any int value.
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#define AMOUNT_1 123
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#define AMOUNT_2 234
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// Create a macro called DIFFERENCE and assign it's value to be the
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// result of AMOUNT_1 minus AMOUNT_2.
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#define DIFFERENCE (AMOUNT_1 - AMOUNT_2)
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// Determine if AMOUNT_1 is greater than AMOUNT_2 using DIFFERENCE (if
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// DIFFERENCE is less than 0, then AMOUNT_2 is larger, vice versa).
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#if ( DIFFERENCE < 0 )
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//If this condition is true, define a macro called OUTPUT and assign
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//it a value of 1.
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#define OUTPUT 1
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//If this condition is false, define a macro called OUTPUT and assign
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#define OUTPUT 0
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[Acuña] Write the final code that would be generated after the preprocessor
has substituted the macros in the following code: [1 points]
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#define AREA_OF_TRIANGLE(b, h) (b * h) / 2.0
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int base = 3;
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int height = 5;
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float area = AREA_OF_TRIANGLE(base, height);
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1:
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2:
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3:
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//Ans: [Acuna]
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int base = 3;
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int height = 5;
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float area = (base * height) / 2.0;
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\begin_layout Section*
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Object-Oriented Programming
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[Lisonbee] Implement a string ADT using a struct and six functions.
At its most simple, a string is an array of characters that is terminated
by a null terminator.
Although having a dedicated string type is generally an OOP concept, we
can still implement it in C.
The struct should use variables to represent an internal data structure,
and the length of the string.
Create six functions: string_create, string_destroy, string_append, string_subs
tring, string_length, and string_display.
Descriptions of each are shown on the next page.
NOTE: you may only use stdlib.h and stdio.h for this problem; you should
include them in your header file.
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Your ADT will be structured with three files: main.c, string.h, and string.c.
The first file (main.c) is provided below, while you will need to implement
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The main.c file contains testing code that uses the string you will be implement
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main.c
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#include "string.h"
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int main() {
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string str, sub_str;
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str = string_create("this is a string");
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printf("String contents: ");
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string_display(str);
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printf("Length: %d
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string_append(str, ", I think...");
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printf("String contents: ");
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string_display(str);
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printf("Length: %d
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sub_str = string_substring(str, 18, 25);
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printf("String contents: ");
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string_display(sub_str);
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printf("Length: %d
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string_destroy(str);
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string_destroy(sub_str);
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return 0;
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}
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Output:
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String contents: this is a string
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Length: 16
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String contents: this is a string, I think...
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Length: 28
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\begin_layout Plain Layout
String contents: I think
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Length: 7
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\begin_layout Standard
\series bold
string.h
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#ifndef STRING_H
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#define STRING_H
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#include <stdlib.h>
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#include <stdio.h>
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//////////////////////////////////////////////////////////////////////
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//Type Definition
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//////////////////////////////////////////////////////////////////////
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//Function Declarations
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//purpose: creates a new string and returns it.
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\begin_layout Plain Layout
//return: new string
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\begin_layout Plain Layout
\end_layout
\begin_layout Plain Layout
\end_layout
\begin_layout Plain Layout
\end_layout
\begin_layout Plain Layout
//purpose: destroys a string.
\end_layout
\begin_layout Plain Layout
//return: n/a
\end_layout
\begin_layout Plain Layout
\end_layout
\begin_layout Plain Layout
\end_layout
\begin_layout Plain Layout
\end_layout
\begin_layout Plain Layout