Submission #2254167

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Source Code Expand

use std::env;
use std::io::*;
use std::str::*;

fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let s = stdin.bytes().map(|c| c.unwrap() as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect::<String>();
    s.parse::<T>().ok().unwrap()
}

fn main() {
    // main の引数
    /*
        引数なしのときargs.len() = 1;
    */
    let args: Vec<String> = env::args().collect();

    let H1: i32 = read();
    let H2: i32 = read();
    println!("{}", H1 - H2);
}

Submission Info

Compile Error

warning: unused variable: `args`, #[warn(unused_variables)] on by default
  --> ./Main.rs:19:9
   |
19 |     let args: Vec<String> = env::args().collect();
   |         ^^^^

warning: variable `H1` should have a snake case name such as `h1`, #[warn(non_snake_case)] on by default
  --> ./Main.rs:21:9
   |
21 |     let H1: i32 = read();
   |         ^^

warning: variable `H2` should have a snake case name such as `h2`, #[warn(non_snake_case)] on by default
  --> ./Main.rs:22:9
   |
22 |     let H2: i32 = read();
   |         ^^

Judge Result