| 9.8.12. Open and close a file | ||
|---|---|---|
 | 9.8. Activities |  |
| 9.8.12. Open and close a file | ||
|---|---|---|
| | 9.8. Activities | |
Section 1 and 2 from Reading and writing with files
Copy the template CFile.templ from
the directory Templates of your shared folder to
the subfolder fopen_fclose.
Write a program with name main.c that
implements the following operations (start from the template in the file
CFile.templ which can be found in the subfolder
fopen_fclose of your shared folder):
Any C program can be executed from the command line
adding words separated by spaces. The main function
receives as parameters an integer (typically it is given the name
argc) with the number of arguments written when invoking
the program (the name of the program counts), and as second parameter an
array of pointers to the strings written in the command line (thus, of
type char **).
Write code in the main to check that the
program is executing with a single argument. If that is not the case,
print a message and terminate.
Open the file using as name the argument given to the program. If the operation fails, notify with a message and terminate the execution.
Close the file and if the operation produces an error, notify it with a message on the screen.
Check the program with different file names, and also with names that do not correspond to any file.
Upload the program to the folder
fopen_fclose in your workspace in Subversion.
| |  | |
| 9.8.11. Using files in C |  | 9.8.13. Read a known number of integers from a file |