complete cow school scripts

Move bash scripts under src/bash_scripts, add college/university/smart cow implementations, and mark the completed TODO items.

TODO.md

@@ -17,17 +17,17 @@
 
 ## 3. Bash Scripts
 
-- [ ] **`cow_kindergarten`**
+- [x] **`cow_kindergarten`**
-  - [ ] Cow says numbers 1 to 10, 1-second pause between each, sticks out tongue at the end.
+  - [x] Cow says numbers 1 to 10, 1-second pause between each, sticks out tongue at the end.
-- [ ] **`cow_primaryschool`**
+- [x] **`cow_primaryschool`**
-  - [ ] Cow says numbers 1 to `n` (argument).
+  - [x] Cow says numbers 1 to `n` (argument).
-- [ ] **`cow_highschool`**
+- [x] **`cow_highschool`**
-  - [ ] Cow says squares (1, 4, 9, ..., `n^2`) (argument).
+  - [x] Cow says squares (1, 4, 9, ..., `n^2`) (argument).
-- [ ] **`cow_college`**
+- [x] **`cow_college`**
-  - [ ] Cow says Fibonacci sequence up to `n`.
+  - [x] Cow says Fibonacci sequence up to `n`.
-- [ ] **`cow_university`**
+- [x] **`cow_university`**
-  - [ ] Cow says prime numbers up to `n`.
+  - [x] Cow says prime numbers up to `n`.
-- [ ] **`smart_cow`**
+- [x] **`smart_cow`**
   - [ ] Cow says a simple arithmetic expression (e.g., "3+11"), eyes show the result.
 - [ ] **`crazy_cow`**
   - [ ] Create a "crazy arithmetic cow" script with something unusual or complex.

bash_scripts/cow_college.sh

@@ -1,18 +0,0 @@
-if [[ $# -ne 1 ]]; then
-  echo "usage: $0 <number>"
-  echo "please provide exactly one numeric argument"
-  exit 1
-fi
-
-if ! [[ "$1" =~ ^[0-9]+$ ]] || (("$1" < 1)); then
-  echo "error: argument must be a positive integer"
-  exit 1
-fi
-
-reset
-for ((i = 2; i < "$(($1 + 1))"; i++)); do
-  cowsay "$((($i - 1) * ($i - 1)))"
-  sleep 1
-  clear
-done
-cowsay -e oo -T U "$(($1 * $1))"

src/bash_scripts/cow_college.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+if [[ $# -ne 1 ]]; then
+  echo "usage: $0 <number>"
+  exit 1
+fi
+
+if ! [[ "$1" =~ ^[0-9]+$ ]] || (($1 < 1)); then
+  echo "error: argument must be a positive integer"
+  exit 1
+fi
+
+n=$1
+
+declare -A memo
+memo[1]=0
+memo[2]=1
+
+result=0
+
+fib() {
+  local k=$1
+  local a
+  local b
+
+  if [[ -n "${memo[$k]:-}" ]]; then
+    result=${memo[$k]}
+    return
+  fi
+
+  fib $((k - 1))
+  a=$result
+
+  fib $((k - 2))
+  b=$result
+
+  memo[$k]=$((a + b))
+  result=${memo[$k]}
+}
+
+for ((i = 1; i <= n; i++)); do
+  fib "$i"
+  value=$result
+
+  if ((i < n)); then
+    printf '%s\n' "$value" | cowsay # il y a eu un peu de problèmes pour afficher correctement le nombre avec cowsay il attendait une sorte d'input ??
+    sleep 1
+    clear
+  else
+    printf '%s\n' "$value" | cowsay -e oo -T U
+  fi
+done

src/bash_scripts/cow_university.sh

@@ -0,0 +1,44 @@
+#!/usr/bin/env bash
+
+if [[ $# -ne 1 ]]; then
+  echo "usage: $0 <number>"
+  exit 1
+fi
+
+if ! [[ "$1" =~ ^[0-9]+$ ]] || (($1 < 2)); then
+  echo "error: argument must be an integer >= 2"
+  exit 1
+fi
+
+n=$1
+# On utilise le crible de Eratosthenes
+declare -a is_prime
+
+for ((i = 0; i <= n; i++)); do
+  is_prime[$i]=1
+done
+
+is_prime[0]=0
+is_prime[1]=0
+
+for ((p = 2; p * p <= n; p++)); do
+  if ((is_prime[p] == 1)); then
+    for ((multiple = p * p; multiple <= n; multiple += p)); do
+      is_prime[$multiple]=0
+    done
+  fi
+done
+
+last_prime=0
+
+for ((i = 2; i <= (n - 1); i++)); do
+  if ((is_prime[i] == 1)); then
+
+    sleep 1
+    clear
+    last_prime=$i
+    printf '%s\n' "$i" | cowsay
+  fi
+done
+reset # un peu sus comme façon de faire on verra pr le changer
+printf '%s\n' "$last_prime" | cowsay -e oo -T U

src/bash_scripts/smart_cow.sh

@@ -0,0 +1,12 @@
+while :; do # on utilise ce code pour etre sur qu'il n'y a pas de biais sur la génération de nombres aléatoire car il y a plus de chance sinon de tomber
+  # sur un nombre entre 0-17 que sur un nombre entre 0-49
+  ra=$RANDOM
+  ((ra < 32750)) && r1=$((ra % 50)) && break # On peut avoir aussi une chance infiniment petite que la boucle ne finisse jamais donc a voir....
+done
+
+while :; do # Pareil mais les valeures favorisée aurait été entre 0-25
+  rb=$RANDOM
+  ((rb < 32742)) && r2=$((rb % 51)) && break
+done
+# on génère entre 0 et 50/49 pour ne pas dépasser les 2 characters limites pour les yeux
+cowsay -e "$(($r1 + $r2))" "$r1 + $r2"