Submission #3455390

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Source Code Expand

use std::io;
fn main() {
        let mut h1 = String::new();
        io::stdin().read_line(&mut h1);
        let h1: i32 = h1.trim().parse().expect("failed");

        let mut h2 = String::new();
        io::stdin().read_line(&mut h2);
        let h2: i32 = h2.trim().parse().expect("failed");

        println!("{}", h1-h2);
}

Submission Info

Compile Error

warning: unused result which must be used, #[warn(unused_must_use)] on by default
 --> ./Main.rs:4:9
  |
4 |         io::stdin().read_line(&mut h1);
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: unused result which must be used, #[warn(unused_must_use)] on by default
 --> ./Main.rs:8:9
  |
8 |         io::stdin().read_line(&mut h2);
  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Judge Result