Update chapter3/src/3_9_5/main.rs

k-nasa · laysakura · web-flow · commit c5b25adc96ce · 2021-05-03T16:18:20.000+09:00
Co-authored-by: Sho Nakatani &lt;lay.sakura@gmail.com&gt;
diff --git a/chapter3/src/3_9_5/main.rs b/chapter3/src/3_9_5/main.rs
@@ -20,7 +20,7 @@ where
 }
 
 fn main() -> Result<()> {
-    let mut file = File::open("test.txt")?;
+    let mut file = File::open("test.txt").expect(r#"動作には4バイト以上の "{}/test.txt" が必要です。"#, std::env::current_dir()?.display());
     let mut new_file = File::create("new_test.txt")?;
 
     copy_n(&mut file, &mut new_file, 4)?;

Original file line number	Diff line number	Diff line change
`@@ -20,7 +20,7 @@ where`
`20`	`20`	`}`
`21`	`21`
`22`	`22`	`fn main() -> Result<()> {`
`23`		`- let mut file = File::open("test.txt")?;`
	`23`	`+ let mut file = File::open("test.txt").expect(r#"動作には4バイト以上の "{}/test.txt" が必要です。"#, std::env::current_dir()?.display());`
`24`	`24`	`let mut new_file = File::create("new_test.txt")?;`
`25`	`25`
`26`	`26`	`copy_n(&mut file, &mut new_file, 4)?;`