du6 - 20

du6/program.c

@@ -10,6 +10,13 @@ typedef struct tree {
     struct tree *right;
 } Tree;
 
+void strip_newline(char *s) {
+    int len = strlen(s);
+    if (len > 0 && s[len-1] == '\n') {
+    	s[len-1] = '\0';
+    }
+}
+
 
 // rekurzivne nacitanie stromu v preorder
 Tree* read_tree() {
@@ -60,18 +67,24 @@ int run_system(Tree *node) {
 	return 1;
     }
 
-    // list -> koniec
+    char c[10];
+    printf("%s\n", node->value);
+    if (fgets(c, sizeof(c), stdin) == NULL) {
+    	printf("Koniec vstupu\n");
+	return 0;
+    }
+    strip_newline(c);
+
     if (!node->left && !node->right) {
 	printf("Koniec vstupu\n");
         return 0;
     }
 
-    int c;
-    if (c == 'a') {
+    if (strcmp(c,'a') == 0) {
 	if (node->left != NULL){
         	return run_system(node->left);
 	}
-    } else if (c == 'n') {
+    } else if (strcmp(c, 'n') == 0) {
 	if (node->right != NULL){
         	return run_system(node->right);
 	}