Rust Tips 比较数值

内容

• 比较与类型转换
• 浮点类型比较

可以用这些运算符比较数值

> < == != >= <=

无法比较不同类型的值

fn main() {
  let a: i32 = 10;
  let b: u16 = 100;
  if a < b { // 报错 mismatched types
    println!("Ten is less than one hundred.");
  }
}

解决办法 1：使用 as 进行类型转换

fn main() {
  let a: i32 = 10;
  let b: u16 = 100;
  if a < (b as i32) {
    println!("Ten is less than one hundred.");
  }
}

注意：从比较小的类型转成比较大的类型通常是比较安全的

fn main() {
    let a: i32 = 10;
    let b: u16 = 100;

    if a < (b as i32) {
        println!("10 is less than 100.")
    }

    let c : i32 = 1203414;
    println!("{}", c as i8);
}

运行

rust_compare_numerical_values on  master [?] is 

标签：compare,via,0.1,numerical,数值,values,Rust,Tips,rust	

From： https://www.cnblogs.com/QiaoPengjun/p/17436557.html