rust 命令行程序开发模板
use std::process::{exit, Command}; use std::time::Duration; fn main() { use std::time::Instant; let now = Instant::now(); //计算耗时 //====================================================...
rust for 循环
fn main() { use std::time::Instant; let now = Instant::now(); //计算耗时 //===================================================== for i in 0..5000 { println!("{}", i)...
rust while 循环输出
fn main() { use std::time::Instant; let now = Instant::now(); //计算耗时 //===================================================== let mut i = 0; while i < 10000 { // 循环体 ...
rust 计算运行耗时代码模板
fn main() { use std::time::Instant; let now = Instant::now(); //计算耗时 //===================================================== //===================================================== ...
rust url 编码解码
use urlencoding::decode; use urlencoding::encode; fn main() { let encoded = encode("https://docs.rs/urlencoding/2.1.0/urlencoding/"); println!("编码后：{}", encoded); ...
rust 文件读写操作
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...
Rust 如何结合逐行读取文件和遍历每行中的每个字符？
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 读写文件
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!("{...
Rust 使用缓存逐行读取txt文本
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(...
Rust 逐行读取txt文本内容
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);...
