在Rust中使用C语言的库功能

主要是了解unsafe{}语法块的作用。

 

#[repr(C)] #[derive(Copy, Clone)] #[derive(Debug)] struct Complex { re: f32, im: f32, } #[link(name = "m")] extern { fn ctanf(z: Complex) -> Complex; } fn tan(z: Complex) -> Complex { unsafe { ctanf(z) } } fn main() { let z = Complex { re: -1., im: 1. }; // z is -1 + i let z_tan = tan(z); println!("the tangens of {:?} is {:?}", z, z_tan); }

转载于:https://www.cnblogs.com/aguncn/p/11481272.html

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