Lab46 Wiki

User Tools

Site Tools

You are here: start » haas » fall2019 » c4eng » projects » mtf1
haas:fall2019:c4eng:projects:mtf1

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
haas:fall2019:c4eng:projects:mtf1 [2019/09/23 12:47] – [Sample run with invalid operation given] wedgehaas:fall2019:c4eng:projects:mtf1 [2019/10/01 12:07] (current) – [Specifications] wedge
Line 13: Line 13:
  
 =====Program===== =====Program=====
-It is your task to enhance the program you wrote last week (**mtf0**) that will use loops and other programming concepts learned this far to automate the display of entire mathematical operation tables (addition, subtraction, multiplication, or division; as indicated by the user). This information is potentially of value to some of your letter division efforts in the pctX projects.+It is your task to enhance the program you wrote last week (**mtf0**) that will use loops and other programming concepts learned this far to automate the display of entire mathematical operation tables (addition, subtraction, multiplication, division, or remainder; as indicated by the user). This information is potentially of value to some of your letter division efforts in the pctX projects.
  
 +=====Specifications=====
 Your program should: Your program should:
 +
   * have valid, descriptive variable names of length //no shorter than// 4 symbols   * have valid, descriptive variable names of length //no shorter than// 4 symbols
 +    * I will make an exception for the use of 'row'
   * prompt the user for the operation ('+' for addition, '-' for subtraction, '*' for multiplication, '/' for division, and '%' for remainder)   * prompt the user for the operation ('+' for addition, '-' for subtraction, '*' for multiplication, '/' for division, and '%' for remainder)
     * properly store this in a variable of type **char**     * properly store this in a variable of type **char**
-    * check for a literal '+', '-', '*', or '/' symbol to determine operation to perform +    * check for a literal '+', '-', '*', '/', or '%' symbol to determine operation to perform 
-      * if invalid input, display an error and exit with a non-zero value+      * if invalid input, display an error and exit with a non-zero value of 1
   * prompt for the starting row (0-9)   * prompt for the starting row (0-9)
     * properly store this in a variable of type **unsigned char**     * properly store this in a variable of type **unsigned char**
Line 30: Line 33:
     * properly store this in a variable of type **unsigned char**     * properly store this in a variable of type **unsigned char**
   * check to make sure starting column, row is less than or equal to the corresponding ending column, row   * check to make sure starting column, row is less than or equal to the corresponding ending column, row
-    * if not, display an error (to STDERR) and exit with non-zero status code+    * if not, display an error (to STDERR) and exit with non-zero status code of 2 (for row) or 3 (for column)
   * display the table, performing the indicated operation   * display the table, performing the indicated operation
     * display both row and column headers, in uniform fashion/formatting throughout     * display both row and column headers, in uniform fashion/formatting throughout
Line 41: Line 44:
   * with certain (not all) operations on certain values, you might end up with a mathematically impossible result. In these cases, check for and avoid performing the computation, instead displaying "NA" in its place.   * with certain (not all) operations on certain values, you might end up with a mathematically impossible result. In these cases, check for and avoid performing the computation, instead displaying "NA" in its place.
   * Only the table (headers/dividers included)should be output to STDOUT. Everything else (the input prompts) should be displayed to STDERR.   * Only the table (headers/dividers included)should be output to STDOUT. Everything else (the input prompts) should be displayed to STDERR.
 +  * For the math operations that are not associative, the row value is the one to be operated against (ie result=row-col).
 +  * To display a '%' character using fprintf, repeat it: %%. That will cancel the otherwise substitutive properties of the symbol in the context of fprintf.
 +=====Compiling=====
 +As we have been doing all along, use the following options to gcc when compiling:
 +
 +<cli>
 +lab46:~/src/c4eng/mtf1$ gcc -Wall --std=gnu99 -o mtf1 mtf1.c
 +lab46:~/src/c4eng/mtf1$ 
 +</cli>
 +
 =====Execution===== =====Execution=====
  
 ====Sample run using multiplication==== ====Sample run using multiplication====
 <cli> <cli>
-lab46:~/src/c4eng/mtf1$ $ ./mtfX+lab46:~/src/c4eng/mtf1$ ./mtf1
 Which operation: * Which operation: *
 Starting Row (0-9): 4 Starting Row (0-9): 4
Line 134: Line 147:
 <cli> <cli>
 lab46:~/src/c4eng/mtf1$ ./mtf1 lab46:~/src/c4eng/mtf1$ ./mtf1
-Which operation ('+' or '*'): x +Which operation: x 
-ERROR: Must specify either '+', '-', '*', '/', or '%'.+ERROR: Must specify '+', '-', '*', '/', or '%'.
 lab46:~/src/c4eng/mtf1$  lab46:~/src/c4eng/mtf1$ 
 </cli> </cli>
  
-====Sample run with invalid column configuration====+====Sample run with invalid row configuration====
 <cli> <cli>
 lab46:~/src/c4eng/mtf1$ ./mtf1 lab46:~/src/c4eng/mtf1$ ./mtf1
-Which operation ('+' or '*'): + +Which operation: + 
-Row (0-9): 5 +Starting Row (0-9): 7 
-Starting Column (0-9): 7 +Ending Row (0-9): 2 
-Ending Column (0-9): 2 +ERROR: Starting row is greater than ending row
-ERROR: Starting column is greater than ending column+
 lab46:~/src/c4eng/mtf1$  lab46:~/src/c4eng/mtf1$ 
 </cli> </cli>
  
 +
 +=====Reference=====
 +In the C4ENG public directory, inside the **mtf1** subdirectory, will be a copy of my implementation (in executable form), which abides by the project specifications. Please compare its output against that of your implementation.
  
 =====Submission===== =====Submission=====
Line 182: Line 197:
 *:mtf1:correct variable types and name lengths used [13/13] *:mtf1:correct variable types and name lengths used [13/13]
 *:mtf1:proper output formatting per specifications [13/13] *:mtf1:proper output formatting per specifications [13/13]
-*:mtf1:submission conforms to project specifications [13/13] 
 *:mtf1:runtime tests of submitted program succeed [13/13] *:mtf1:runtime tests of submitted program succeed [13/13]
 *:mtf1:no negative compiler messages for program [13/13] *:mtf1:no negative compiler messages for program [13/13]
haas/fall2019/c4eng/projects/mtf1.1569242846.txt.gz · Last modified: 2019/09/23 12:47 by wedge

Page Tools

Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
CC Attribution-Share Alike 4.0 International Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki