lol thnx its working now but like this
while (strcspn(Book.name,"qwertyuiopasdfghjklzxcvbnm1234567890") != NULL || ( strlen(Book.name) < 4 ))
hahahaha now
can u tell me is it possible to calculate the number of books in the librery by suming up all the copies ?
i tried to put
int sum;
int total; ( both of them not in struct)
and open a new case
total = sum(Book.copies) but it wont work :S