So I am writing a program which stores the details of a movie in a file. I have about 25 records. I need to write a function which checks the sizeof Name[] in each record, and if it is 0 , it must printf "Empty" , else it must printf "Taken".
This is the details structure of each record :
Code:typedef struct Movies { char Name[50]; char Artist[25]; char Rating [10]; } Movies;
You need to check the length of a string inside the array, not its size - it is not changeable.
How can I access the length of string from the record in file please?
1. Read file content using fopen() , fread() , fclose() functions from stdio.h
2. Check string length with strlen() from string.h
When adding records to a file, the program is automatically saving records after each other , for example it starts at 0,1,2 etc. But can I for example store a record directly at position 40 for example ?
Regardless of whether your movie name is "The Matrix" or "Gone With The Wind", each of your records will be the same size - namely sizeof(Movies)
The only way to print "Empty" is to make sure that say .Name[0] is '\0' say (which is an easy thing to do and check anyway).
An empty record still takes up sizeof(Movies) in the file.
But the plus side is, you can update single records without having to rewrite the entire file.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
