basic/base-type/numbers #644
Replies: 56 comments 65 replies
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use num::complex::Complex; fn main() { println!("{} {}i", result.re, result.im) |
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既然要演示提高可读性,这是中文教程,1_000_000是不是写成 100_0000 更合适。 |
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所有领导都是人,简单的很。 |
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关于位运算,无符号应该是逻辑右移,有符号是算术左移。 |
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& 位与 相同位置均为1时则为1,否则 |
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"所有跟 NaN 交互的操作,都会返回一个 NaN,而且 NaN 不能用来比较" |
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当检测到整型溢出时,Rust 会按照补码循环溢出(two’s complement wrapping)的规则处理。 如果是按照这个规则编译,那运行结果将不符合预期,比如说: |
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前端垃圾小白提问: |
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这个版本float类型的to_bits 方法好像无法使用了 |
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刚刚测试, |
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“在当使用 --release 参数进行 release 模式构建时,Rust 不检测溢出。”
构建:
版本:
|
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for i in 1..=5 { 好像加 = 和不加 = 都可以? |
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建议用 |
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请教各位, (!b) value is -4 |
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// 类型标注 |
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“固定精度的十进制小数,常用于货币相关的场景” |
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需要注意的是位非运算符 |
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艾丽根特,速怕艾丽根特! |
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溢出部分有点难以理解,这里贴一个知乎的部分内容:
原贴地址:知乎 |
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在Rust中,数值类型主要分为整数类型和浮点数类型,它们之间的区别主要体现在数值范围和精度上。
总体而言,选择合适的数值类型取决于所需的精度和范围。例如,如果需要较大范围的整数或者更高的精度,可以选择相应的整数或浮点数类型。 by chatGPT |
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类型转换那里真的太精彩了,建议大家跳转过去看看 |
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fn main() {
let x = (-42.0_f32).sqrt();
if x.is_nan() {
println!("未定义的数学行为")
}
} 为什么println这行有无分号都能运行?是Rust的特性? |
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a <<= b; 大佬们这句用来干嘛的啊 没太看懂 |
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首先会去做同步,然后再运行 |
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Rust默认的整数类型不是i32吗?我定义了两个变量,一个是默认类型,一个是i8类型,但是它们也是可以进行运算的,代码如下:
如果将变量b换成i16也是可以运算的,但如果显示的将变量a定义为i32或者其他与b不同的类型,那么就无法进行运算了,所以编译器是会在运算的时候将未显式指定的数据类型偷偷换成显式指定的变量的那种数据类型吗? |
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fn main() { |
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rust对于溢出的规则是不是改了,为什么我--release还是无法通过编译 |
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basic/base-type/numbers
https://course.rs/basic/base-type/numbers.html
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