C program

Why segmentation fault? Explain

char * str; Printf("enter your input:") ; fgets(str, 20, stdin) ; Printf("%s", str) ;

2. Does this code fix it? Why or why not. If no, write your own code below

Void allocate_mem(char * str) { str = (char *) malloc (20* sizeof(char)) ; }

Int main(){

char * str; Printf("enter your input:") ; allocate_mem(str) ; fgets(str, 20, stdin) ; Printf("%s", str) ;