commit 7155aa5a6e3370718cfc9d87f032507088562229
Author: Akemi Izuko <akemi@noway.moe>
Date:   Thu May 2 19:45:08 2024 -0600

    Lab 3: add description

diff --git a/lab-3/check.sh b/lab-3/check.sh
new file mode 100755
index 0000000..c3c0fd4
--- /dev/null
+++ b/lab-3/check.sh
@@ -0,0 +1,138 @@
+#!/usr/bin/env bash
+declare -r program="$1"
+declare -r tmp1=tmp1 #"$(mktemp)"
+declare -r tmp2=tmp2 #"$(mktemp)"
+
+declare -ri case_1_a1=1
+declare -ri case_1_a2=4
+declare -r case_1="$(mktemp)"
+cat <<'EOM' > "$case_1"
+$$$$
+$$$$
+$$$$
+$$$$
+EOM
+
+declare -ri case_2_a1=1
+declare -ri case_2_a2=10
+declare -r case_2="$(mktemp)"
+cat <<'EOM' > "$case_2"
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+EOM
+
+declare -ri case_3_a1=2
+declare -ri case_3_a2=6
+declare -r case_3="$(mktemp)"
+cat <<'EOM' > "$case_3"
+  $$
+ $$$$
+$$$$$$
+EOM
+
+declare -ri case_4_a1=2
+declare -ri case_4_a2=7
+declare -r case_4="$(mktemp)"
+cat <<'EOM' > "$case_4"
+   $
+  $$$
+ $$$$$
+$$$$$$$
+EOM
+
+declare -ri case_5_a1=3
+declare -ri case_5_a2=14
+declare -r case_5="$(mktemp)"
+cat <<'EOM' > "$case_5"
+$$$$$$$$$$$$$$
+ $$$$$$$$$$$$
+  $$$$$$$$$$
+   $$$$$$$$
+    $$$$$$
+     $$$$
+      $$
+EOM
+
+declare -ri case_6_a1=4
+declare -ri case_6_a2=14
+declare -r case_6="$(mktemp)"
+cat <<'EOM' > "$case_6"
+      $$
+     $$$$
+    $$$$$$
+   $$$$$$$$
+  $$$$$$$$$$
+ $$$$$$$$$$$$
+$$$$$$$$$$$$$$
+ $$$$$$$$$$$$
+  $$$$$$$$$$
+   $$$$$$$$
+    $$$$$$
+     $$$$
+      $$
+EOM
+
+declare -ri case_7_a1=4
+declare -ri case_7_a2=15
+declare -r case_7="$(mktemp)"
+cat <<'EOM' > "$case_7"
+       $
+      $$$
+     $$$$$
+    $$$$$$$
+   $$$$$$$$$
+  $$$$$$$$$$$
+ $$$$$$$$$$$$$
+$$$$$$$$$$$$$$$
+ $$$$$$$$$$$$$
+  $$$$$$$$$$$
+   $$$$$$$$$
+    $$$$$$$
+     $$$$$
+      $$$
+       $
+EOM
+
+if ! gcc -Wall -Wextra -Werror -std=c99 "$program"; then
+  echo "Program compiled with errors. Did NOT pass check"
+  exit 1
+fi
+
+run_case() {
+  local a1="$1"
+  local a2="$2"
+  local tmp="$3"
+  local comp="$4"
+  local case="$5"
+
+  if ! ./a.out $a1 $a2 > "$tmp"; then
+    echo "Error at runtime on case $case"
+    exit 2
+  fi
+
+  sed -i 's#\s*$##' "$tmp"
+
+  if ! diff -qy "$tmp" "$comp"; then
+    echo "Input does not match for case $case"
+    exit 2
+  fi
+}
+
+# Case 1
+run_case "$case_1_a1" "$case_1_a2" "$tmp1" "$case_1" 1
+run_case "$case_2_a1" "$case_2_a2" "$tmp1" "$case_2" 2
+run_case "$case_3_a1" "$case_3_a2" "$tmp1" "$case_3" 3
+run_case "$case_4_a1" "$case_4_a2" "$tmp1" "$case_4" 4
+run_case "$case_5_a1" "$case_5_a2" "$tmp1" "$case_5" 5
+run_case "$case_6_a1" "$case_6_a2" "$tmp1" "$case_6" 6
+run_case "$case_7_a1" "$case_7_a2" "$tmp1" "$case_7" 7
+
+echo "You passed! Commit to git before the deadline"
diff --git a/lab-3/lab_3_description.md b/lab-3/lab_3_description.md
new file mode 100644
index 0000000..1463d44
--- /dev/null
+++ b/lab-3/lab_3_description.md
@@ -0,0 +1,168 @@
+# Lab 3 - Fancy shapes
+
+In this lab we'll be focusing on the C programming aspect. This will cover
+for-loops and if-statements. To practice these we'll be drawing some shapes in
+the terminal!
+
+The input will be one of the following numbers, passed through argv:
+ 1. A square
+ 2. A triangle
+ 3. An inverted triangle (upside down)
+ 4. A diamond
+
+Your program will take in 2 arguments. The first is a number between 1 and 4,
+indicating which of the shapes listed above you'll be printing. The second
+argument is a number indicating the _largest horizontal width_ of the shape. For
+example, for a triangle, this'll be the width of the base.
+
+Your program will print the indicated shape at the indicated dimensions. Write
+your code in a `main.c` file, then run `bash check.sh main.c` to test your code.
+
+## Examples
+
+#### Example 1
+
+```
+./a.out 1 4
+```
+
+Output:
+
+```
+$$$$
+$$$$
+$$$$
+$$$$
+```
+
+#### Example 2
+
+```
+./a.out 1 10
+```
+
+Output:
+
+```
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+$$$$$$$$$$
+```
+
+#### Example 3
+
+```
+./a.out 2 6
+```
+
+Output:
+
+```
+  $$
+ $$$$
+$$$$$$
+```
+
+Notice how with an even number for the width, will result with 2 at the top, not
+one.
+
+#### Example 4
+
+```
+./a.out 2 7
+```
+
+Output:
+
+```
+   $
+  $$$
+ $$$$$
+$$$$$$$
+```
+
+#### Example 5
+
+```
+./a.out 3 14
+```
+
+Output:
+
+```
+$$$$$$$$$$$$$$
+ $$$$$$$$$$$$
+  $$$$$$$$$$
+   $$$$$$$$
+    $$$$$$
+     $$$$
+      $$
+```
+
+#### Example 6
+
+```
+./a.out 4 14
+```
+
+Output:
+
+```
+      $$
+     $$$$
+    $$$$$$
+   $$$$$$$$
+  $$$$$$$$$$
+ $$$$$$$$$$$$
+$$$$$$$$$$$$$$
+ $$$$$$$$$$$$
+  $$$$$$$$$$
+   $$$$$$$$
+    $$$$$$
+     $$$$
+      $$
+```
+
+#### Example 7
+
+```
+./a.out 4 15
+```
+
+Output:
+
+```
+       $
+      $$$
+     $$$$$
+    $$$$$$$
+   $$$$$$$$$
+  $$$$$$$$$$$
+ $$$$$$$$$$$$$
+$$$$$$$$$$$$$$$
+ $$$$$$$$$$$$$
+  $$$$$$$$$$$
+   $$$$$$$$$
+    $$$$$$$
+     $$$$$
+      $$$
+       $
+```
+
+## Testing
+
+Run the following command to test your work:
+
+```
+bash check.sh main.c
+```
+
+If the output doesn't say you passed, your program has a bug. Fix it and then
+try again.