// Rust program to read text from a file.usestd::io::Read;fnmain(){letmutfileRef=std::fs::File::open("sample.txt").unwrap();letmutdata=String::new(); fileRef.read_to_string(&mutdata).unwrap(); print!("FILE DATA:\n{}", data); } ...
("In file {}", filename); let mut f = File::open(filename).expect("file not found"); let mut contents = String::new(); f.read_to_string(&mut contents) .expect("something went wrong reading the file"); println!("With text:\n{}", contents); } 示例12-4:读取第二个参数所...
usestd::env;usestd::fs;fnmain() {// --snip--println!("In file {}", filename);letcontents = fs::read_to_string(filename) .expect("Something went wrong reading the file");println!("With text:\n{}", contents); } 示例12-4:读取第二个参数所指定的文件内容 ...
如果你想要读取类似算法题输入的语法,可以用 text_io 这个库,相似的库也有很多。text_iogithub.co...
; let mut f = File::create("words.txt") .expect("unable to create file"); f.write_all(info.as_bytes()).expect("Could not write"); } Output:We then use the cat command to read text from the words.txt.$ cat words.txt Output:...
usestd::io::prelude::*;fnmain(){// --snip--println!("In file {}",filename);letmutf=File::open(filename).expect("file not found");letmutcontents=String::new();f.read_to_string(&mutcontents).expect("something went wrong reading the file");println!("With text:\n{}",contents);...
Thisisa text file. 这是一个将文本文件内容读入字符串的程序: 实例 usestd::fs; fnmain(){ lettext=fs::read_to_string("D:\\text.txt").unwrap(); println!("{}",text); } 运行结果: Thisisa text file. 在Rust 中读取内存可容纳的一整个文件是一件极度简单的事情,std::fs 模块中的 read_to...
ruplacer - Find and replace text in source files sd - Intuitive find & replace CLI sstadick/hck - A faster and more featureful drop in replacement for cut vishaltelangre/ff - Find files (ff) by name! whitfin/bytelines [bytelines] - Read input lines as byte slices for high effici...
useserde::{Deserialize,Serialize};usestd::error::Error;usestd::fs;#[derive(Debug, Clone, Deserialize, Serialize)]structConfig{text:String,}fnread_file()->Result<Config,Box<dynError>>{letcontent=fs::read_to_string("./input.txt")?;letparsed=serde_json::from_str(&content)?;Ok(parsed)...
由于File 是 String 的类型别名,因此 "继承" 了 String 的所有方法 调用这个函数没有任何意义(程序会崩溃) 在示例代码中,这些新的内容需要理解: (1) 还没有创建代表文件的持久化对象(字符串中可以编码的内容是有限的) (2)没有实现 read() 函数(如果实现,如何处理失败的情况?) ...