Structure as a parameter of extern function C - c

Question

I have to read a text file using this structure. Also, I have to use external functions. I made the code for file reading and it works in main function.
Text file:
banana 3 orange 8 music 9- first character is a blank space*
#include <stdio.h>
#include <stdlib.h>
struct file
{
char name[30];
char size;
};
int main()
{
int n=0;
struct file f[30];
FILE *files;
files=fopen("files.txt","r");
int n=0;
while (1)
{
fgetc(files);
if(feof(files)) break;
fscanf(files,"%s %c",&f[n].name,&f[n].size);
n++;
}
}
But when I try to make this reading using another c file and extern function it's no working.. :(
This is what is written in filereading.c:
void fileReading(struct file *f[30], FILE *files)
{
int n=0;
while (1)
{
fgetc(files);
if(feof(files)) break;
fscanf(files,"%s %c",&f[n].name,&f[n].size);
n++;
}
}
And fileReading.h:
void fileReading(struct fisier *, FILE *);
And in main.c:
#include <stdio.h>
#include <stdlib.h>
struct file
{
char name[30];
char size;
};
int main()
{
int n=0;
struct file f[30];
FILE *files;
files=fopen("files.txt","r");
fileReading(f[30],files);
}
When I compile it, it says:
request for member 'name' in something not a structure or union
request for member 'size' in something not a structure or union|
||=== Build finished: 2 errors, 2 warnings (0 minutes, 0 seconds) ===||
Can you help me, please? Thank you!

Answer 1

From what I see it looks like you do not have a good understanding of pointers.
These changes should solve your problem:
void fileReading(struct file *f, FILE *files)
{
int n=0;
while (1)
{
fgetc(files);
if(feof(files)) break;
fscanf(files,"%s %c",f[n].name,&f[n].size);
//printf("%s %c",f[n].name,f[n].size);
n++;
}
}
int main()
{
int n=0;
struct file f[30];
FILE *files;
files=fopen("files.txt","r");
fileReading(f,files);
}
What you did wrong:
void fileReading(struct file *f[30], FILE *files) //here you were saying file is a **
fscanf(files,"%s %c",&f[n].name,&f[n].size); // here you need to send the a char* but you were sending a char ** as a second parameter
fileReading(f[30],files); // here you were sending the 31th element of the structure array f which by the way doesn't exist (indexing is from 0 , f[29] is the last) even though that was not what you wanted to do in the first place

Answer 2

The file fileReading.c doesn't know the definition of struct file. You need to move it from main.c to fileReading.h and #include "fileReading.h" in both main.c and fileReading.c.
Also, the definition and call of fileReading is incorrect. Instead of:
void fileReading(struct file *f[30], FILE *files)
You want:
void fileReading(struct file *f, FILE *files)
And you call it like this:
fileReading(f,files);
This is incorrect:
fileReading(f[30],files);
Because you're passing a single struct file instead of the array, and the single instance you're passing is one element off the end of the array (since the size is 30, valid indexes are 0-29), which can cause indefined behavior.