Great C programming funHEADmaster

Excellent fundamentals and displine training, many tools and techniques
exercises: gdb, emacs, valgrind, git

4 files changed, 154 insertions, 0 deletions

diff --git a/03_code2/README b/03_code2/README
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+Open the code2.c file you have in this directory.
+You will see two functions:  printTriangle and main.
+
+As with the previous problem, the printTriangle function
+has an algorithm written as comments, but there is no code.
+You should translate this algorithm to code.
+
+In main, there are three print statements which print out a triangle
+with height 4, and the total number of stars in that triangle (returned
+by the printTriangle function).
+
+There is also a comment asking you to write a few more statements
+to do the same thing for a triangle of height 7.
+Add the code to do this.
+
+When you have done this, run
+
+./test.sh
+
+As before, this script will try to compile your code (which you will learn about
+ina n upcoming lesson), as well as run it.   If your code does not have legal
+syntax, it will do its best to describe what is wrong.  If there
+is a problem, look at the code and try to see where you did not follow
+the syntax rules from Course 1  The line number and message it gives
+may help you find the problem.  If you cannot find the problem after a minute
+or two, ask for help.
+
+If your code has legal syntax, test.sh will also run it, and show
+you the output it produced, as well as the output we expected.
+
+If they are the same, you should commit, push, and grade.
+
+If they are not, you should see if you can fix the problem (and ask for help
+if you cannot).
diff --git a/03_code2/code2.c b/03_code2/code2.c
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+++ b/03_code2/code2.c
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+
+int printTriangle(int size) {
+  //start with starCount being 0
+  int starCount = 0;
+
+  //count from 0 (inclusive) to size (exclusive), for each number i that you count
+  for (int i = 0; i < size; i++) {
+
+     //count from 0 (inclusive) to i (inclusive), for each number j that you count
+    for (int j = 0; j <= i; j++) {
+
+        //print a "*"
+      printf("*");
+
+        //increment starCount
+      starCount++;
+    } 
+
+     //when you finish counting on j, 
+
+     //print a newline ("\n")
+    printf("\n");
+  }
+
+  //when you finish counting on i, 
+
+  //your answer is starCount
+  return starCount;
+
+}
+
+
+int main(void) {
+  int numStars;
+  printf("Here is a triangle with height 4\n");
+  numStars = printTriangle(4);
+  printf("That triangle had %d total stars\n", numStars);
+  //now print "Here is a triangle with height 7\n"
+  printf("Here is a triangle with height 7\n");
+
+  //then call printTriangle, passing in 7, and assign the result to numStars
+  numStars = printTriangle(7);
+
+  //finally, print "That triangle had %d total stars\n", such that the %d 
+  //prints the value of numStars
+  printf("That triangle had %d total stars\n", numStars); 
+
+
+  return 0;
+}
+
diff --git a/03_code2/grade.txt b/03_code2/grade.txt
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+++ b/03_code2/grade.txt
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+Grading at Sat 27 Nov 2021 02:21:26 AM UTC
+Checking code2.c for legal syntax
+Checking for int printTriangle (int size)
+Found on line 4, column 1 
+Checking for int main(void)
+Found on line 35, column 1 
+Trying to run the code..
+Your file matched the expected output
+Removing your main() and replacing it with our own to run more tests...
+Testing printTriangle(0) ... Correct
+Testing printTriangle(1) ... Correct
+Testing printTriangle(2) ... Correct
+Testing printTriangle(3) ... Correct
+Testing printTriangle(4) ... Correct
+Testing printTriangle(7) ... Correct
+Testing printTriangle(9) ... Correct
+Testing printTriangle(12) ... Correct
+Testing printTriangle(142) ... Correct
+Testing printTriangle(191) ... Correct
+Testing printTriangle(2037) ... Correct
+Testing printTriangle(2479) ... Correct
+
+Overall Grade: A
diff --git a/03_code2/test.sh b/03_code2/test.sh
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+++ b/03_code2/test.sh
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+#!/bin/bash
+cat > temp.c <<EOF
+#include <stdio.h>
+#include <stdlib.h>
+EOF
+cat code2.c >> temp.c
+gcc -Wall -Werror -pedantic -std=gnu99 temp.c -o code2 2>errors.txt
+if [ "$?" = "0" ]
+    then
+    echo "Your code appears to have legal syntax!"
+    echo "Here is what I get when I run it..."
+    echo "-----------------"
+    ./code2
+    echo "-----------------"
+    echo "Here is what I would expect the answers to be:"
+    echo "----------------"
+    cat <<EOF 
+Here is a triangle with height 4
+*
+**
+***
+****
+That triangle had 10 total stars
+Here is a triangle with height 7
+*
+**
+***
+****
+*****
+******
+*******
+That triangle had 28 total stars
+EOF
+    echo "---------------"
+    else
+    echo "Oh no, the syntax of your code is not correct!"
+    mesg=`grep error errors.txt | head -1`
+    ln=`echo "$mesg" | cut -f2 -d":"`
+    let ln=${ln}-2
+    echo "I discovered the problem on line $ln "
+    echo "(though the problem may be earlier and I just got confused)"
+    echo "Here is my best attempt to describe what is wrong:"
+    echo "$mesg" | cut -f5 -d":"
+    fi
+rm -f errors.txt temp.c code2
+