1 #include 
     
       2 #include 
      
        3  4 typedef struct ListElmt_ 5 { 6     void *data; 7     struct ListElmt_ *next; 8 } ListElmt; 9 10 int main() {11 12 13     ListElmt list;14     //char str = 'a';15     //list.data = &str;16     //*(list.data) = 'a';17 18     list.data = malloc(10);19     *( (char *) list.data) = 'a';20 21 22     printf("%c", *( (char *) list.data));23 24     return 0;25 }