Fixing the empty test

du6/program.c

@@ -3,7 +3,7 @@
 #include <assert.h>
 #include <stdlib.h>
 #include <stdbool.h>
-#define SIZE 100
+#define SIZE 1000
 
 
 struct tree{
@@ -27,6 +27,9 @@ struct tree* read_tree(){
     char buffer[SIZE];
     memset(buffer,0,SIZE);
     char* r = fgets(buffer,SIZE,stdin);
+    if(!r){
+        return NULL;
+    }
     r[strcspn(r, "\n")] = '\0';
     assert(r);
     struct tree* node = calloc(1,sizeof(struct tree));
@@ -39,9 +42,6 @@ struct tree* read_tree(){
     }
     node->left = read_tree();
     node->right = read_tree();
-    // Ak je nacitany riadok listovy uzol ,tak netreba robit nic
-    // inak rekurzivne nacitanie laveho syna
-    // a rekurzivne nacitanie praveho syna
     return node;
 }
 void print_tree(struct tree* tree,int offset){
@@ -73,11 +73,6 @@ int main(void){
 
     struct tree* tree = read_tree();
     char line[SIZE];
-    
-    if(!tree){
-        printf("Bazu sa nedalo nacitat'.\n");
-        return 0;
-    }
     while( fgets(line, sizeof(line), stdin)){
          line[strcspn(line, "\n")] = '\0';
          if(line[0] == '\0'){
@@ -86,14 +81,14 @@ int main(void){
          }
 
     }
-    if(!whitespace){
+    if(!whitespace && tree != NULL){
         printf("No whitespace after database\n");
         return 0;
     }
     int numOfLeaves = count_leaves(tree);
     char answer[SIZE];
     printf("Expert z bufetu to vie.\n");
-    if(!tree){
+    if(tree == NULL){
         printf("Chybna databaza\n");
         return 0;
     }