first commit

Author: yuk1ty

.gitignore

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+/target

Cargo.lock

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+[workspace]
+members = [
+    "chapter2"
+]

Cargo.toml

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+# learning-systems-programming-in-rust
+
+「Rust ならわかるシステムプログラミング」

README.md

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+[package]
+name = "chapter2"
+version = "0.1.0"
+authors = ["yytyd <[email protected]>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+
+[[bin]]
+name = "oswriter"
+path = "src/main_2_4_1.rs"

chapter2/Cargo.toml

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+use std::fs::File;
+use std::io::Write;
+
+fn main() -> std::io::Result<()> {
+    let mut file = File::create("test.txt")?;
+    file.write(b"os.File example\n")?;
+    Ok(())
+}