add zh/tuple.md

en/src/compound-types/tuple.md

@@ -31,7 +31,7 @@ fn main() {
 }
 ```
 
-🌟 Destructuring tuple with patter.
+🌟 Destructuring tuple with pattern.
 ```rust,editable
 
 fn main() {
@@ -51,6 +51,7 @@ fn main() {
 fn main() {
     let (x, y, z);
 
+    // fill the blank
     __ = (1, 2, 3);
     
     assert_eq!(x, 3);
@@ -63,7 +64,7 @@ fn main() {
 ```rust,editable
 
 fn main() {
-   // fill the blank to make it work
+   // fill the blank, need a few computations here.
    let (x, y) = sum_multiply(__);
 
    assert_eq!(x, 5);

zh-CN/src/compound-types/tuple.md

@@ -1 +1,77 @@
-# tuple
+# 元组( Tuple )
+🌟 元组中的元素可以是不同的类型。元组的类型签名是 `(T1, T2, ...)`, 这里 `T1`, `T2` 是相对应的元组成员的类型.
+```rust,editable
+
+fn main() {
+    let _t0: (u8,i16) = (0, -1);
+    // 元组的成员还可以是一个元组
+    let _t1: (u8, (i16, u32)) = (0, (-1, 1));
+    // 填空让代码工作
+    let t: (u8, __, i64, __, __) = (1u8, 2u16, 3i64, "hello", String::from(", world"));
+}
+```
+
+🌟 可以使用索引来获取元组的成员
+```rust,editable
+
+// 修改合适的地方，让代码工作
+fn main() {
+   let t = ("i", "am", "sunface");
+   assert_eq!(t.1, "sunface");
+}
+```
+
+🌟 过长的元组无法被打印输出
+```rust,editable
+
+// 修复代码错误
+fn main() {
+    let too_long_tuple = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13);
+    println!("too long tuple: {:?}", too_long_tuple);
+}
+```
+
+🌟 使用模式匹配来解构元组
+```rust,editable
+
+fn main() {
+    let tup = (1, 6.4, "hello");
+
+    // 填空
+    let __ = tup;
+
+    assert_eq!(x, 1);
+    assert_eq!(y, "hello");
+    assert_eq!(z, 6.4);
+}
+```
+
+🌟🌟 解构式赋值
+```rust,editable
+fn main() {
+    let (x, y, z);
+
+    // 填空
+    __ = (1, 2, 3);
+    
+    assert_eq!(x, 3);
+    assert_eq!(y, 1);
+    assert_eq!(z, 2);
+}
+```
+
+🌟🌟 元组可以用于函数的参数和返回值
+```rust,editable
+
+fn main() {
+   // 填空，需要稍微计算下
+   let (x, y) = sum_multiply(__);
+
+   assert_eq!(x, 5);
+   assert_eq!(y, 6);
+}
+
+fn sum_multiply(nums: (i32, i32)) -> (i32, i32) {
+    (nums.0 + nums.1, nums.0 * nums.1)
+}
+```