foo.c:3: warning: ignoring '#pragma warning ' [-Wunknown-pragmas]
    3 | #pragma warning(disable:4996)
      | 
foo.c:11:12: error: unknown type name 'Node'
   11 | int Search(Node* head, int x)
      |            ^~~~
foo.c:26:13: error: unknown type name 'Node'
   26 | void Insert(Node* &head, int x)
      |             ^~~~
foo.c: In function 'main':
foo.c:50:5: error: unknown type name 'Node'; use 'struct' keyword to refer to the type
   50 |     Node* head = NULL;
      |     ^~~~
      |     struct 
foo.c:54:9: warning: implicit declaration of function 'Insert' [-Wimplicit-function-declaration]
   54 |         Insert(head, k);
      |         ^~~~~~
foo.c:57:12: warning: implicit declaration of function 'Search'; did you mean 'bsearch'? [-Wimplicit-function-declaration]
   57 |     int h= Search(head, x);
      |            ^~~~~~
      |            bsearch

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