first version of the reading cow

TODO.md

@@ -36,11 +36,11 @@
 
 ## 4. C Programming
 
-- [ ] **`newcow.c`**
-  - [ ] Create `affiche_vache` function: displays a cow without a speech bubble.
-  - [ ] Compile and run.
+- [x] **`newcow.c`**
+  - [x] Create `affiche_vache` function: displays a cow without a speech bubble.
+  - [x] Compile and run.
 - [ ] **Add Features**
-  - [ ] Support `-e`/ `--eyes` option to change cow's eyes.
+  - [x] Support `-e`/ `--eyes` option to change cow's eyes.
   - [ ] Implement other options from `cowsay` manpage.
 - [ ] **New Feature**
   - [ ] Implement a new feature (e.g., `--tail L` to adjust tail length, or display a herd).

file

@@ -0,0 +1 @@
+bonjour

src/C/newcow.c

@@ -1,12 +1,23 @@
 #include <stdio.h>
+#include <string.h>
 
-int main() {
-  const char *cow = "            ^__^\n"
-                    "            (oo)\\_______\n"
-                    "            (__)\\       )\\/\\\n"
-                    "                ||----w |\n"
-                    "                ||     ||\n";
+void affiche_vache(char yeux[3]) {
+  printf(" \\   ^__^\n");
+  printf("  \\  (%s)\\_______\n", yeux);
+  printf("     (__)\\       )\\/\\\n");
+  printf("         ||----w |\n");
+  printf("         ||     ||\n");
+}
 
-  printf("%s", cow);
+int main(int argc, char *argv[]) {
+  char yeux[3] = "oo";
+
+  if (argc == 3 &&
+      (strcmp(argv[1], "-e") == 0 || strcmp(argv[1], "--eyes") == 0)) {
+    strncpy(yeux, argv[2], 2);
+    yeux[2] = '\0';
+  }
+
+  affiche_vache(yeux);
   return 0;
 }

src/C/newcow2.c

@@ -0,0 +1,101 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+void update() { printf("\033[H\033[J"); }
+
+void gotoxy(int x, int y) { printf("\033[%d;%dH", y, x); }
+
+void affiche_vache(int x, int y, const char *yeux, const char *langue) {
+  gotoxy(x, y);
+  printf("        \\   ^__^\n");
+
+  gotoxy(x, y + 1);
+  printf("         \\  (%s)\\_______\n", yeux);
+
+  gotoxy(x, y + 2);
+  printf("            (__)\\       )\\/\\\\\n");
+
+  gotoxy(x, y + 3);
+  printf("             %s ||----w |\n", langue);
+
+  gotoxy(x, y + 4);
+  printf("                ||     ||\n");
+
+  fflush(stdout);
+}
+
+void animation_blink() {
+  for (int i = 0; i < 12; i++) {
+    update();
+    if (i % 4 == 0)
+      affiche_vache(5, 3, "--", "  ");
+    else
+      affiche_vache(5, 3, "oo", "  ");
+    usleep(250000);
+  }
+}
+
+void animation_tongue() {
+  for (int i = 0; i < 12; i++) {
+    update();
+    if (i % 2 == 0)
+      affiche_vache(5, 3, "oo", "U ");
+    else
+      affiche_vache(5, 3, "oo", "  ");
+    usleep(250000);
+  }
+}
+
+void animation_walk() {
+  for (int x = 1; x <= 40; x += 2) {
+    update();
+    if ((x / 2) % 2 == 0)
+      affiche_vache(x, 3, "oo", "  ");
+    else
+      affiche_vache(x, 3, "OO", "  ");
+    usleep(120000);
+  }
+}
+
+void animation_bounce() {
+  int x = 20;
+  for (int i = 0; i < 18; i++) {
+    update();
+    int y;
+    if (i % 4 == 0 || i % 4 == 2)
+      y = 3;
+    else
+      y = 2;
+    affiche_vache(x, y, "oo", "  ");
+    usleep(180000);
+  }
+}
+
+void usage(char *prog) {
+  printf("Usage : %s [blink|tongue|walk|bounce]\n", prog);
+}
+
+int main(int argc, char *argv[]) {
+  if (argc != 2) {
+    usage(argv[0]);
+    return 1;
+  }
+
+  if (strcmp(argv[1], "blink") == 0) {
+    animation_blink();
+  } else if (strcmp(argv[1], "tongue") == 0) {
+    animation_tongue();
+  } else if (strcmp(argv[1], "walk") == 0) {
+    animation_walk();
+  } else if (strcmp(argv[1], "bounce") == 0) {
+    animation_bounce();
+  } else {
+    usage(argv[0]);
+    return 1;
+  }
+
+  gotoxy(1, 10);
+  return 0;
+}

src/C/reading_cow.c

@@ -0,0 +1,134 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define MAX_TEXT 1024
+
+void update() { printf("\033[H\033[J"); }
+
+void gotoxy(int x, int y) { printf("\033[%d;%dH", y, x); }
+
+void print_repeat(char c, int n) {
+  for (int i = 0; i < n; i++) {
+    putchar(c);
+  }
+}
+
+void affiche_bulle(const char *texte) {
+  int len = strlen(texte);
+
+  putchar(' ');
+  print_repeat('_', len + 2);
+  putchar('\n');
+
+  printf("< %s >\n", texte);
+
+  putchar(' ');
+  print_repeat('-', len + 2);
+  putchar('\n');
+}
+
+void affiche_vache(char lettre_en_bouche) {
+  printf("        \\   ^__^\n");
+
+  if (lettre_en_bouche == '\0')
+    printf("         \\  (oo)\\_______\n");
+  else
+    printf("         \\  (%c%c)\\_______\n", lettre_en_bouche,
+           lettre_en_bouche);
+
+  printf("            (__)\\       )\\/\\\\\n");
+  printf("                ||----w |\n");
+  printf("                ||     ||\n");
+}
+
+void affiche_scene(const char *deja_lu, char lettre_en_bouche) {
+  update();
+  affiche_bulle(deja_lu);
+  affiche_vache(lettre_en_bouche);
+  fflush(stdout);
+}
+
+void usage(const char *prog) {
+  fprintf(stderr, "Usage: %s [-i intervalle] fichier\n", prog);
+  fprintf(stderr, "   ou: %s [-i intervalle] -\n", prog);
+  fprintf(stderr, "Le fichier '-' signifie lecture depuis stdin.\n");
+}
+
+int main(int argc, char *argv[]) {
+  double intervalle = 1.0;
+  char *nom_fichier = NULL;
+  FILE *f = NULL;
+
+  for (int i = 1; i < argc; i++) {
+    if (strcmp(argv[i], "-i") == 0) {
+      if (i + 1 >= argc) {
+        fprintf(stderr, "erreur : -i attend une valeur.\n");
+        usage(argv[0]);
+        return 1;
+      }
+
+      intervalle = atof(argv[i + 1]);
+      if (intervalle < 0) {
+        fprintf(stderr, "erreur : l'intervalle doit etre >= 0.\n");
+        return 1;
+      }
+      i++;
+    } else if (nom_fichier == NULL) {
+      nom_fichier = argv[i];
+    } else {
+      fprintf(stderr, "erreur : trop d'arguments.\n");
+      usage(argv[0]);
+      return 1;
+    }
+  }
+
+  if (nom_fichier == NULL) {
+    usage(argv[0]);
+    return 1;
+  }
+
+  if (strcmp(nom_fichier, "-") == 0) {
+    f = stdin;
+  } else {
+    f = fopen(nom_fichier, "r");
+    if (f == NULL) {
+      perror("erreur ouverture fichier");
+      return 1;
+    }
+  }
+
+  char texte_lu[MAX_TEXT];
+  int taille = 0;
+  texte_lu[0] = '\0';
+
+  int c;
+  useconds_t pause_us =
+      (useconds_t)(intervalle * 1000000.0); // Car usleep est en ms.
+
+  while ((c = fgetc(f)) != EOF) {
+    if (taille >= MAX_TEXT - 1) {
+      fprintf(stderr, "erreur : texte trop long (max %d caracteres).\n",
+              MAX_TEXT - 1);
+      if (f != stdin)
+        fclose(f);
+      return 1;
+    }
+
+    affiche_scene(texte_lu, (char)c);
+    usleep(pause_us);
+
+    texte_lu[taille++] = (char)c;
+    texte_lu[taille] = '\0';
+    affiche_scene(texte_lu, '\0');
+    usleep(pause_us);
+  }
+
+  if (f != stdin) {
+    fclose(f);
+  }
+
+  gotoxy(1, 10);
+  return 0;
+}

src/bash_scripts/smart_cow.sh

@@ -14,7 +14,7 @@ if [ $# -eq 0 ]; then
     ((rb < 32742)) && r2=$((rb % 51)) && break
   done
   result=$((r1 + r2))
-  message="$r1 + $r2 = $result"
+  message="$r1 + $r2"
 else
   expression="$1"
   result=$(echo "scale=2; $expression" | bc -l)