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--- haas:spring2014:cprog:projects [2014/02/20 17:50] – [Projects] wedge
+++ haas:spring2014:cprog:projects [2014/04/18 14:56] (current) – [Projects] wedge
@@ Line 11: / Line 11: @@
   * [[/haas/spring2014/cprog/projects/squares|Squares]] (due 20140214)
   * [[/haas/spring2014/cprog/projects/dayofweek|Day of Week]] (due 20140221)
-  * [[/haas/spring2014/cprog/projects/multby11|Multiply by 11]] (due 20140228)
+  * [[/haas/spring2014/cprog/projects/nikhilam|Nikhilam]] (due 20140228)
-  * [[/haas/spring2014/cprog/projects/vertcross|Vertically and Crosswise]] (due 20140307)
+  * [[/haas/spring2014/cprog/projects/multby11|Multiply by 11]] (due 20140307)
+  * [[/haas/spring2014/cprog/projects/vertcross|Vertically and Crosswise]] (due 20140321)
+======Week 10======
+  * Questions
+  * structs
+  * structs in action
+======Week 9=====
+  * Question and answer week. Some good code examples too.
+======Week 8=====
+  * As I teach the lab, I wasn't able to give out warning grades. I sent a list to Joe, who promptly did not get to submitting warning grades. However... I was rather unsettled by what I saw:
+    * 16 total people in the class
+    * 7 are doing fine (~43%)
+      * most have only submitted 3 or 4 out of 6 projects
+      * most have been very attentive on their Opus
+      * most have attended most if not all classes
+    * 2 would be doing fine (~12%) if they would keep their Opus up-to-date (at least one entry per week)
+      * projects/attendance are actually on the upper end
+      * don't forget about the Opus!
+    * 7 are not doing fine (~43%)
+      * none to 2 out of 6 projects submitted
+      * attendance is all over the place (never through all)
+      * opus is all over the place (1 entry total through just over 1 entry per week)
+    * So, 2+7 = 9; 9/16 = 56%.
+      * more than half the class is not passing (this is new to me)
+        * I don't seem to be getting enough questions based on the lack of work I'm seeing
+        * I know some people aren't spending enough time on class material (how are you going to learn it if you don't play with it)
+      * 56% of the class would get an F in the class if grades were to be submitted now
+  * We seem to have gotten about a week behind on project completion. Well, for those who have been being active and attentive in class.
+    * I've made the next project due in 2 weeks instead of 1 to help you get caught up.
+  * Remember:
+    * I can answer questions from Joe's side of class
+    * Joe can answer questions from my side of class
+    * We have tutors, they can help
+    * I can answers questions from my side of class
+      * I can answer said questions outside of class
+      * I can answer said questions inside of/during class
+        * Asking questions is good
+======Week 7======
+  * Be sure your Opus is up to date with your weekly progress and exploits!
+  * loops
+    * for
+    * while
+    * do while
+  * functions
+    * return type
+    * parameters
+    * function prototypes
+======Week 6======
+  * arrays
+    * pointer arithmetic
+  * loops
+    * for
+    * while
+    * do while
+  * Type in these programs, compile/execute them, and pour through the code. Your task is to:
+    * figure out what is going on with each and every step
+    * ask questions on things you do not understand
+  * Be sure to update your Opus!
+=====Single Dimensional Array of Characters=====
+Arrays are commonly used to simulate strings in C.
+<code c 1>
+/*
+ * This code should produce a warning on compilation. Fix it.
+ */
+#include <stdio.h>
+int main()
+{
+    int i;
+    char input[12];
+    fprintf(stdout, "Enter an 11-character max string: ");
+    fgets(input, 11, stdin);
+    fprintf(stdout, "There are %d characters in your string\n", strlen(input)+1);
+    for(i=0; i<=strlen(input); i++)
+    {
+        if (input[i] == '\n')
+            fprintf(stdout, "input[%d]: '\\n' (%3.3hhu, 0x%.2hhX)\n", i, *(input+i), *(input+i));
+        else if (*(input+i) == '\0')
+            fprintf(stdout, "input[%d]: '\\0' (%3.3hhu, 0x%.2hhX)\n", i, *(input+i), *(input+i));
+        else
+            fprintf(stdout, "input[%d]: '%c'  (%3.3hhu, 0x%.2hhX)\n", i, *(input+i), *(input+i), *(input+i));
+    }
+    return(0);
+}
+</code>
+=====Single Dimensional Array and Memory=====
+To have a better understanding of arrays, we should note how they are represented in memory. Pay close attention to the output of this program:
+<code c 1>
+#include <stdio.h>
+int main()
+{
+    int i;
+    unsigned short int data[8] = { 255, 256, 49152, 13, 65535, 2600 };
+    fprintf(stdout, "=======================================================\n");
+    fprintf(stdout, "Please enter a valid unsigned short int value: ");
+    fscanf(stdin, "%hu", &data[6]);
+    fprintf(stdout, "Please enter another valid unsigned short int value: ");
+    fscanf(stdin, "%hu", (data+7));
+    fprintf(stdout, "The data array starts at address 0x%X\n\n", &data);
+    for(i = 0; i < 8; i++)
+    {
+        fprintf(stdout, "*(data+%d) contains: %hu (0x%.4X)\n", i, *(data+i), *(data+i));
+        fprintf(stdout, " (data+%d) is at address: 0x%X\n", i, (data+i));
+        fprintf(stdout, "     Lower-Order byte at 0x%X contains: 0x%.2hhX\n", ((char *)data+(i*2)+0), *((char *)data+(i*2)+0));
+        fprintf(stdout, "     Upper-Order byte at 0x%X contains: 0x%.2hhX\n", ((char *)data+(i*2)+1), *((char *)data+(i*2)+1));
+        fprintf(stdout, "\n");
+    }
+    fprintf(stdout, "=======================================================\n");
+    return(0);
+}
+</code>
+=====Command-line Arguments and 2D Array Manipulation=====
+Here we play with a two-dimensional array created by the system, via the command-line arguments provided to main():
+<code c 1>
+/*
+ * Fun with arrays and loops using command-line arguments
+ *
+ * Try renaming the executable, and running it with different numbers/lengths of arguments
+ */
+#include <stdio.h>
+#include <string.h>
+int main(int argc, char **argv)
+{
+    int i, j;
+    fprintf(stdout, "You typed: ");
+    for(i = 0; i < argc; i++)
+        fprintf(stdout, "%s ", argv[i]);
+    fprintf(stdout, "\n\n");
+    for(i = 0; i < argc; i++)
+        fprintf(stdout, "*(argv+%d) / argv[%d]: %s\n", i, i, argv[i]);
+    fprintf(stdout, "\n\n");
+    for(i = 0; i < argc; i++)
+    {
+        for(j = 0; j <= strlen(argv[i]); j++)
+        {
+            if ((*(*(argv+i)+j)) == '\0')
+                fprintf(stdout, "*(*(argv+%d)+%d): '\\0' ", i, j);
+            else
+                fprintf(stdout, "*(*(argv+%d)+%d): '%.2c'  ", i, j, (*(*(argv+i)+j)));
+            fprintf(stdout, "(%.3d / 0x%2.2X)\n", (*(*(argv+i)+j)), (*(*(argv+i)+j)));
+        }
+        fprintf(stdout, "\n");
+    }
+    fprintf(stdout, "\n");
+    return(0);
+}
+</code>
 ======Week 5======
@@ Line 19: / Line 189: @@
     * if/else if/else
     * switch/case
-  * arrays
+  * value of taking the modulus (remainder) of a number
-    * creating
+    * with integers, math has no decimal points-- such values are dropped/truncated
-    * using
+    * 4 <nowiki>%</nowiki> 6 = 4
-    * pointers
+    * 22 <nowiki>%</nowiki> 8 = 6
-  * loops
+    * 22 / 8 = 2
-    * for loops for assisting in array manipulation
+    * 4 / 6 = 0
-  * probably will not get to all this stuff
+  * pointers (briefly-- ask more and again)
-  * overview of next project
+    * <nowiki>*</nowiki> - dereferences (looks up what is at the memory address contained in the pointer)
+    * <nowiki>&</nowiki> - address of (looks up the address of the variable in memory)
+    * Pointer-related video: [[http://www.youtube.com/watch?v=5VnDaHBi8dM|Pointer Fun with Binky]]
+  * on lab46, if you see a C function you don't know, try looking up its manual page:
+    * for printf(): **man 3 printf**
+    * for atoi(): **man 3 atoi**
+    * for rand(): **man 3 rand**
+      * this is good for finding out what addition header files need to be included
+  * did some code walk-throughs/desk checking.
+    * for the following programs, work out by hand the values for **i** and **m** when x is:
+      * 1
+      * 2
+      * 3
+      * 4
+===Sample code 1===
+<code c>
+#include <stdio.h>
+#include <stdlib.h>
+int main()
+{
+    int i, x, m = 0;
+    srand(time(NULL));
+    x = rand()%4 +1;
+    for(i=0;i<x;i++)
+    {
+        m = m + i + x;
+    }
+    if(m<8)
+        i=7;
+    else if(m==16)
+        i=4;
+    else if((m%2)==1)
+        i=33;
+    else
+        i=6;
+    printf("%d\n", m);
+    return(0);
+}
+</code>
+===Sample code 2===
+<code c>
+#include <stdio.h>
+#include <stdlib.h>
+int main(int argc, char **argv)
+{
+    int m, i, x;
+    if(argc <2)
+    {
+        fprintf(stderr, "Error!\n");
+        exit(1);
+    }
+    x= atoi(argv[1]);
+    for(i=0;i<x;i++)
+    {
+        m = m+i+x;
+    }
+    m=m%8;
+    switch(m)
+    {
+        case 0:
+            i=3;
+            break;
+        case 1:
+        case 2:
+            i=12;
+            break;
+        case 4:
+        case 7:
+            i=7;
+            break;
+        case 5:
+            i=2;
+            break;
+        default:
+            i=0;
+            break;
+    }
+    printf("%d\n", m);
+    return(0);
+}
+</code>
 ======Week 4======

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