INGIniousYou have to write a function called filter which will return the message contained in a list of nodes. Each node contains a character (usefull or not), you must concatenate these characters and return the corresponding phrase . You have to ignore the all characters, excepts letters and spaces.
/**
* Structure node
*
* @next: pointer to the following node of the list, NULL if last node
* @value: value contained in the node
*/
typedef struct node{
struct node* next;
char value;
} node_t;
Example of use :
- list of nodes :
{'h', 'e', '\\', 'l', 'l', ';', '&', 'o', ' '}returns"hello " - list of nodes :
NULLreturnsNULL