add chapter6 directories

Author: yuk1ty

chapter6/Cargo.toml

@@ -7,4 +7,24 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-lib = { path = "../lib" }
+lib = { path = "../lib" }
+
+[[bin]]
+name = "6_5"
+path = "src/6_5/main.rs"
+
+[[bin]]
+name = "6_6"
+path = "src/6_6/main.rs"
+
+[[bin]]
+name = "6_7"
+path = "src/6_7/main.rs"
+
+[[bin]]
+name = "6_8"
+path = "src/6_8/main.rs"
+
+[[bin]]
+name = "6_9"
+path = "src/6_9/main.rs"

chapter6/src/6_5/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, World!");
+}

chapter6/src/6_6/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, World!");
+}

chapter6/src/6_7/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, World!");
+}

chapter6/src/6_8/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, World!");
+}

chapter6/src/6_9/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, World!");
+}