A01250513-Gramáticas

labs/07/chatbot.l

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+%{
+#include "y.tab.h"
+%}
+
+%%
+
+hello           { return HELLO; }
+hi              { return HELLO; }
+hey             { return HELLO; }
+goodbye         { return GOODBYE; }
+bye             { return GOODBYE; }
+time            { return TIME; }
+what[' ']is[' ']your[' ']name { return NAME; }
+what[' ']is[' ']the[' ']weather { return WEATHER; }
+how[' ']are[' ']you { return FEELINGS; }
+what[' ']is[' ']the[' ']time  { return TIME; }
+what[' ']time[' ']is[' ']it  { return TIME; }
+\n              { return 0; }  /* End of input on newline */
+
+.               { return yytext[0]; }
+
+%%
+
+int yywrap() {
+    return 1;
+}

labs/07/chatbot.y

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+%{
+#include <stdio.h>
+#include <time.h>
+
+void yyerror(const char *s);
+int yylex(void);
+%}
+
+%token HELLO GOODBYE TIME WEATHER FEELINGS NAME 
+
+%%
+
+chatbot : greeting
+        | farewell
+        | query
+        ;
+
+greeting : HELLO { printf("Chatbot: Hello! How can I help you today?\n"); }
+         ;
+
+farewell : GOODBYE { printf("Chatbot: Goodbye! Have a great day!\n"); }
+         ;
+
+query : TIME { 
+            time_t now = time(NULL);
+            struct tm *local = localtime(&now);
+            printf("Chatbot: The current time is %02d:%02d.\n", local->tm_hour, local->tm_min);
+         }
+        | WEATHER {
+            printf("Va llover! Corre a tu casa.");
+        }
+        | FEELINGS {
+            printf("Ya me quiero graduar :c");
+        }
+        | NAME {
+            printf("Soy RODO, soy tu...");
+        }
+       ;
+
+%%
+
+int main() {
+    printf("Chatbot: Hi! You can greet me, ask for the time, or say goodbye.\n");
+    while (yyparse() == 0) {
+        // Loop until end of input
+    }
+    return 0;
+}
+
+void yyerror(const char *s) {
+    fprintf(stderr, "Chatbot: I didn't understand that.\n");
+}