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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <stdlib.h>
  4.  
  5. struct NODE
  6. {
  7.   int val;
  8.   struct NODE *left;
  9.   struct NODE *right;
  10. };
  11. struct NODE *root = NULL;
  12.  
  13. void insert(int val)
  14. {
  15.   struct NODE *new_node;
  16.   struct NODE *p;
  17.  
  18.   new_node = malloc(sizeof(struct NODE));
  19.   new_node->val = val;
  20.   new_node->left = new_node->right = NULL;
  21.  
  22.   if(root == NULL){
  23.     root = new_node;
  24.   }
  25.   else{     
  26.     p = root;
  27.     while(p != NULL){
  28.       if(val < p->val){
  29.         if(p->left == NULL){
  30.           p->left = new_node;
  31.           break;
  32.         }
  33.         p = p->left;
  34.       }
  35.       else{
  36.         if(p->right == NULL){
  37.           p->right = new_node;
  38.           break;
  39.         }
  40.         p = p->right;
  41.       }
  42.     }
  43.   }
  44. }
  45.  
  46. void print(struct NODE *n)
  47. {
  48.   if(n == NULL){
  49.     return;
  50.   }
  51.   print(n->left);
  52.   printf("%d ", n->val);   
  53.   print(n->right);
  54. }
  55.  
  56. void insertValues(FILE *f)
  57. {
  58.   char c[10];
  59.  
  60.   while (fgets(c, 10, f) != NULL) {
  61.     insert(atoi(c));
  62.   }
  63. }
  64.  
  65. int main(void)
  66. {
  67.   FILE *f;  
  68.  
  69.   f = fopen("numbers.txt", "r");
  70.   insertValues(f);
  71.   fclose(f);
  72.  
  73.   print(root);
  74.   printf("\n");
  75.   return 0;
  76. }
  77.  
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https://ideone.com/IG7ggY
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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