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README.md | 4 years ago |
README.md
handling
Instructions
Write a function, called open_or_create
which has two arguments:
file : &str
which is the name of the filecontent: &str
which will be the content to be written into the file
This function should try to open a file, if it does not exist, it should create it. In case something goes wrong, it should panic, with the error.
Notions
Expected Function
pub fn open_or_create(s: &str, content: &str) {
}
Usage
Here is a program to test your function
use std::fs::File;
use std::io::Read;
use handling::*;
fn main() {
let path = "a.txt";
File::create(path).unwrap();
open_or_create(path, "content to be written");
let mut file = File::open(path).unwrap();
let mut s = String::new();
file.read_to_string(&mut s).unwrap();
println!("{}", s);
}
And its output:
student@ubuntu:~/[[ROOT]]/test$ cargo run
content to be written
student@ubuntu:~/[[ROOT]]/test$