IO Functions

Functions สำหรับ Input/Output operations

Reading from Stdin

use std::io::{self, BufRead, Write};

fn main() {
    // Read line
    print!("Enter your name: ");
    io::stdout().flush().unwrap();

    let mut name = String::new();
    io::stdin().read_line(&mut name).expect("Failed to read");
    let name = name.trim();

    println!("Hello, {}!", name);

    // Read multiple lines
    println!("Enter numbers (empty line to stop):");
    let stdin = io::stdin();
    let mut numbers: Vec<i32> = Vec::new();

    for line in stdin.lock().lines() {
        let line = line.expect("Failed to read");
        if line.is_empty() {
            break;
        }
        if let Ok(n) = line.parse() {
            numbers.push(n);
        }
    }

    println!("Sum: {}", numbers.iter().sum::<i32>());
}