fn main() { use std::time::Instant; let now = Instant::now(); //计算耗时 //===================================================== //===================================================== ...
use urlencoding::decode; use urlencoding::encode; fn main() { let encoded = encode("https://docs.rs/urlencoding/2.1.0/urlencoding/"); println!("编码后:{}", encoded); ...
文章目录一、读取文件二、写入文件一、读取文件use std::fs::File; fn main() { let f = File::open("hello.txt").unwrap(); } 1、按字节读取use std::fs::File; use std::io::prelude::*; fn main() { let mut f = File...
use std::io::{BufRead, BufReader}; use std::fs::File; fn main() { let file = File::open("1.txt").expect("cannot open file"); let file = BufReader::new(file); for li...
Rust 1.26及更高版本如果您不想关心基础细节,则可以使用单行功能进行读写。读取文件到 Stringuse std::fs; fn main() { let data = fs::read_to_string("/etc/hosts").expect("Unable to read file"); println!("{...
fn main() -> std::io::Result<()> { let mut reader = my_reader::BufReader::open("data.txt")?; let mut buffer = String::new(); while let Some(line) = reader.read_line(...
demo1:use std::fs::File; use std::io::{self, prelude::*, BufReader}; fn main() -> io::Result<()> { let file = File::open("data.txt")?; let reader = BufReader::new(file);...