macOS File address

[brcondor]

Hi all.
I'm new to this forum.
I'm going slightly mad for a little problem.
I'm programming with Xcode using C language. I need to open a file and then to read it. I use fopen to open and fread to copy the informations inside this file.
The problem is with fopen: how can I find the correct address for my file? I mean, i tried to just copy the address starting from /Users/name_users/fullpath/myfile.jpg but the pointer point to Null(it means, nothing happens).
I tried to check if the address is correct from the command line but the answer is my folder doesn't exist: "iMac-di-andrea:~ andreacondorelli$ /Users/andreacondorelli/prova C/Prova/Prova/compressione/Compressione/Compressione
-bash: /Users/andreacondorelli/prova: No such file or directory
iMac-di-andrea:~ andreacondorelli$ /"

If I try to open a file from desktop, i read "/Users/andreacondorelli/documents/test.jpg
-bash: /Users/andreacondorelli/documents/test.jpg: Permission denied"

Maybe the problem is with the permission.
The C code is
FILE *fp1;
char nome[100];
[...code here ...]
fp1=fopen(nome,"rb");

 

[gnasher729]

There's a tiny little bit missing in the C code. I wonder why you didn't post it. Is it because you are absolutely sure that that part of the code is bug free? That's usually where you find the bugs.