Scanf

如果你知道 C 中的它，功能相同但具有内存安全性。

let mut number: u32 = 0;
let mut name: String = String::new();
if scanf!("{},{}", number, name).is_ok() {
    println!("Input is: {} and {}", number, name);
}

let input = "5,something";
let mut number: u32 = 0;
let mut name: String = String::new();
if let Err(error) = sscanf!(input, "{},{}", number, name) {
    panic!("Error {} using sscanf!", error);
}

请参阅文档中的更多示例。

lib.rs:

scanf! & sscanf!

与 C 中的类似，但具有内存安全性。

示例

use scanf::scanf;

let mut product: String = String::new();
let mut price: f32 = 0.0;
println!("Insert product and price (product: price):");
if scanf!("{}: {}", product, price).is_ok() {
    println!("Price of {} is {:.2}", product, price);
}

use scanf::sscanf;

let input: &str = "Candy: 2.75";
let mut product: String = String::new();
let mut price: f32 = 0.0;
println!("Insert product and price (product: price):");
sscanf!(input, "{}: {}", product, price);
println!("Price of {} is {:.2}", product, price);

可以在格式字符串中指定类型

let mut product: String = String::new();
let mut price: f32 = 0.0;
println!("Insert product and price (product: price):");
scanf!("{string}: {f32}", product, price);

还可以转义括号

let input: &str = "{Candy}";
let mut product: String = String::new();
sscanf!(input, "{{{}}}", product);
assert_eq!(product, "Candy");

示例已编译，sscanf 的示例也作为测试运行。如果您在使用示例代码时遇到问题，请创建一个问题。