a2

a2/pig_latin.h

@@ -0,0 +1,6 @@
+#ifndef PIG_LATIN_H
+#define PIG_LATIN_H
+
+char *translate(const char *phrase);
+
+#endif

a2/program.c

@@ -0,0 +1,72 @@
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "pig_latin.h"
+
+static int is_vowel(char c) {
+    return c=='a' || c=='e' || c=='i' || c=='o' || c=='u';
+}
+
+static int is_consonant(char c) {
+    return c >= 'a' && c <= 'z' && !is_vowel(c);
+}
+
+static void translate_word(const char *word, char *buf) {
+    int len = (int)strlen(word);
+
+    if (is_vowel(word[0]) ||
+        (len >= 2 && word[0]=='x' && word[1]=='r') ||
+        (len >= 2 && word[0]=='y' && word[1]=='t')) {
+        sprintf(buf, "%say", word);
+        return;
+    }
+
+    int i = 0;
+    while (i < len && is_consonant(word[i]) && word[i] != 'y') {
+        if (word[i] == 'q' && i + 1 < len && word[i+1] == 'u') break;
+        i++;
+    }
+
+    int split;
+
+    if (i < len - 1 && word[i] == 'q' && word[i+1] == 'u') {
+        split = i + 2;
+    }
+    else if (i > 0 && i < len && word[i] == 'y') {
+        split = i;
+    }
+    else {
+        split = i > 0 ? i : 1;
+    }
+
+    strncpy(buf, word + split, len - split);
+    buf[len - split] = '\0';
+    strncat(buf, word, split);
+    strcat(buf, "ay");
+}
+
+char *translate(const char *phrase) {
+    if (!phrase) return NULL;
+
+    int plen = (int)strlen(phrase);
+    char *result = malloc(plen * 2 + 16);
+    if (!result) return NULL;
+    result[0] = '\0';
+
+    char *copy = malloc(plen + 1);
+    strcpy(copy, phrase);
+
+    char word_buf[512];
+    int first = 1;
+    char *token = strtok(copy, " ");
+    while (token != NULL) {
+        translate_word(token, word_buf);
+        if (!first) strcat(result, " ");
+        strcat(result, word_buf);
+        first = 0;
+        token = strtok(NULL, " ");
+    }
+
+    free(copy);
+    return result;
+}