126 lines
2.5 KiB
C
126 lines
2.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define SIZE 256
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typedef struct tree {
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char value[SIZE];
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struct tree *left;
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struct tree *right;
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} Tree;
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void strip_newline(char *s) {
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int len = strlen(s);
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if (len > 0 && s[len-1] == '\n') {
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s[len-1] = '\0';
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}
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}
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// rekurzivne nacitanie stromu v preorder
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Tree* read_tree() {
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char buffer[SIZE];
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if (!fgets(buffer, SIZE, stdin))
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return NULL;
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// prazdny riadok -> koniec
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if (strcmp(buffer, "\n") == 0)
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return NULL;
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Tree *node = calloc(1, sizeof(Tree));
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strcpy(node->value, buffer);
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// odpoved -> list
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if (buffer[0] == '*') {
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node->left = NULL;
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node->right = NULL;
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} else {
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node->left = read_tree();
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node->right = read_tree();
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}
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return node;
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}
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void destroy_tree(Tree *tree) {
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if (!tree) return;
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destroy_tree(tree->left);
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destroy_tree(tree->right);
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free(tree);
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}
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int count_leaves(Tree *tree) {
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if (!tree) return 0;
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if (!tree->left && !tree->right) return 1;
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return count_leaves(tree->left) + count_leaves(tree->right);
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}
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// spustenie znalostneho systemu
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int run_system(Tree *node) {
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if (node == NULL){
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return 1;
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}
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if (node->value[0] == '*'){
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printf("%s\n", node->value);
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return 1;
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}
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char c[10];
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printf("%s\n", node->value);
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if (fgets(c, sizeof(c), stdin) == NULL) {
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printf("Koniec vstupu\n");
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return 0;
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}
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strip_newline(c);
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if (!node->left && !node->right) {
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printf("Koniec vstupu\n");
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return 0;
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}
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if (strcmp(c,"a") == 0) {
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if (node->left != NULL){
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return run_system(node->left);
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}
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} else if (strcmp(c, "n") == 0) {
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if (node->right != NULL){
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return run_system(node->right);
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}
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} else {
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printf("Nerozumiem\n");
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return 0;
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}
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return 1;
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}
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int main() {
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Tree *root = read_tree();
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printf("Expert z bufetu to vie.\n");
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if (root == NULL){
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printf("Chybna databaza\n");
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return 0;
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}
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/* // skontrolovat prazdny riadok
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char buffer[SIZE];
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if (!fgets(buffer, SIZE, stdin) || strlen(buffer) > 1) {
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printf("Chybna databaza\n");
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destroy_tree(root);
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return 0;
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}*/
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int leaves = count_leaves(root);
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printf("Pozna %d druhov ovocia a zeleniny.\n", leaves);
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printf("Odpovedajte 'a' pre prvu moznost alebo 'n' pre druhu moznost.\n");
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int continueworking = run_system(root);
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if (continueworking){
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printf("Koniec\n");
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}
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destroy_tree(root);
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return 0;
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}
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