Language in C 面试题与答案

Question: How do I define a pointer to a function which returns a char pointer?

Answer: char * ( *p )( ) ;
or
typedef char * ( * ptrtofun )( ) ;
ptrtofun p ;
Here is a sample program which uses this definition.
main( )
{
typedef char * ( * ptrtofun ) ( ) ;
char * fun( ) ;
ptrtofun fptr ;
char *cptr ;
fptr = fun ;
cptr = (*fptr) ( ) ;
printf ( "nReturned string is "%s"", cptr ) ;
}
char * fun( )
{
static char s[ ] = "Hello!" ;
printf ( "n%s", s ) ;
return s ;
}