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du6/program.c

@@ -0,0 +1,70 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define SIZE 256
+
+struct tree{
+    char text[SIZE];
+    struct tree* yes;
+    struct tree* no;
+};
+
+struct tree* read_tree(){
+    char buffer[SIZE];
+    if(!fgets(buffer,SIZE,stdin)) return NULL;
+    if(buffer[0]=='\n') return NULL;
+    struct tree* t=malloc(sizeof(struct tree));
+    strcpy(t->text,buffer);
+    t->yes=NULL;
+    t->no=NULL;
+    if(buffer[0]=='*') return t;
+    t->yes=read_tree();
+    t->no=read_tree();
+    return t;
+}
+
+void destroy_tree(struct tree* t){
+    if(!t) return;
+    destroy_tree(t->yes);
+    destroy_tree(t->no);
+    free(t);
+}
+
+int count_items(struct tree* t){
+    if(!t) return 0;
+    if(t->text[0]=='*') return 1;
+    return count_items(t->yes)+count_items(t->no);
+}
+
+void run_chatbot(struct tree* t){
+    printf("%s",t->text);
+    if(t->text[0]=='*'){
+        printf("Koniec\n");
+        return;
+    }
+    printf("Odpovedajte 'a' pre prvu moznost alebo 'n' pre druhu moznost.\n");
+    char c;
+    if(scanf(" %c",&c)!=1){
+        printf("Chyba vstupu.\n");
+        return;
+    }
+    if(c=='a') run_chatbot(t->yes);
+    else if(c=='n') run_chatbot(t->no);
+    else printf("Nespravny vstup. Odpovedajte len 'a' alebo 'n'.\n");
+}
+
+int main(){
+    struct tree* root=read_tree();
+    if(!root){
+        printf("Chyba: nepodarilo sa nacitat bazu pravidiel.\n");
+        return 0;
+    }
+    int items=count_items(root);
+    printf("Expert z bufetu to vie.\n");
+    printf("Pozna %d druhov ovocia a zeleniny.\n",items);
+    run_chatbot(root);
+    destroy_tree(root);
+    return 0;
+}
+