Code shared from the Rust Playground

parse_env_args.rs

use std::env;

fn main() {
    let mut args: Vec<String> = env::args().collect();
    let mut verbose = false;
    let mut output_file: Option<String> = None;
    args.push("-v".to_string());
    args.push("-o".to_string());
    args.push("test.txt".to_string());
    let mut i = 1; // Start from 1 to skip the executable path
    while i < args.len() {
        match args[i].as_str() {
            "-v" | "--verbose" => {
                verbose = true;
            }
            "--output" | "-o" => {
                i += 1;
                if i < args.len() {
                    output_file = Some(args[i].clone());
                } else {
                    eprintln!("Error: Missing output file after --output");
                    std::process::exit(1);
                }
            }
            arg => {
                println!("Argument: {}", arg);
            }
        }
        i += 1;
    }

    println!("Verbose: {}", verbose);
    println!("Output file: {:}", output_file.unwrap());
}