c - What is the behavior of the following code? -

#include <stdio.h>  #include <stdlib.h>  struct node {       int data;      struct node *next; };  struct node* insert(struct node *root) {      root->data = 12; //here     return root;  } int main() {      struct node *root;     insert(root);     return 0;  } 

shouldn't program crash @ place have placed comment in insert function because have not initialized malloc?

this called undefined behavior never know might happen.crash still possibility.

using uninitialized variabled lead undefined behavior.