use std::fs::File;
use std::io::prelude::*;
fn main()
{
let mut file = File::open("file.txt").expect("Can't open file");
let mut contents = String::new();
file.read_to_string(&mut contents).expect("Error");
println!("\n\n{}", contents);
}
Shouldn't use std::fs::File; already have the read_to_string() function?