static void modify_rating( struct Ordered_container* lib_ID )
{
struct Record* rec;
int ID, rating;
/* read input and check for errors */
if ( !read_int( &ID ) || !read_int( &rating ) )
return;
rec = get_data_ptr( lib_ID, comp_Record_to_ID, &ID );
if ( rec )
{
/* make sure rating is in range */
if ( rating < MIN_RATING || rating > MAX_RATING )
{
print_error( "Rating is out of range!\n" );
return;
}
printf( "Rating for record %d changed to %d\n", get_Record_ID(rec), rating );
set_Record_rating( rec, rating );
}
else
{
print_error( "No record with that ID!\n" );
}
}
struct Record* load_Record(FILE* infile)
{
int record_id, rating;
char medium[RECORD_MEDIUM_SIZE];
char title[RECORD_TITLE_SIZE];
struct Record *new_record;
char fmt_str[30];
sprintf(fmt_str, "%%d %%%ds %%d", RECORD_MEDIUM_SIZE-1);
if (fscanf(infile, fmt_str, &record_id, medium, &rating) != 3)
return NULL;
fgetc(infile); /* read the leading space */
if (!fgets(title, RECORD_TITLE_SIZE, infile)) {
return NULL;
}
title[strlen(title)-1] = '\0'; /* remove the newline character */
new_record = create_Record(medium, title);
set_Record_rating(new_record, rating);
new_record->ID = record_id;
id_number_counter--;
/* set id_number counter to the largest record_id read in */
if (record_id > id_number_counter)
id_number_counter = record_id;
return new_record;
}