public/subjects/panic

panic

Instructions

Write a function that tries to open a file and panics if the file does not exist.

Notions

Expected Function

pub fn open_file(s: &str) -> File {

}

Usage

Here is a program to test your function:

use std::fs::File;
use std::fs;
use panic::*;

fn main() {
    let filename = "created.txt";
    File::create(filename).unwrap();
    let a = open_file(filename);
    println!("{:?}", a);
    fs::remove_file(filename).unwrap();
}

And its output:

student@ubuntu:~/[[ROOT]]/test$ cargo run
File { fd: 3, path: "[[ROOT]]/a.txt", read: true, write: false }
student@ubuntu:~/[[ROOT]]/test$