update

exercise/exercises/if/README.md

@@ -1,7 +1,7 @@
 # If
 
-`if`, the most basic type of control flow, is what you'll learn here.
+你将在这学习最基本的控制流（control flow）——`if`
 
-## Further information
+## 更多信息
 
 - [Control Flow - if expressions](https://doc.rust-lang.org/book/ch03-05-control-flow.html#if-expressions)

exercise/exercises/if/if1.rs

@@ -3,14 +3,14 @@
 // I AM NOT DONE
 
 pub fn bigger(a: i32, b: i32) -> i32 {
-    // Complete this function to return the bigger number!
-    // Do not use:
-    // - another function call
-    // - additional variables
-    // Execute `rustlings hint if1` for hints
+    // 完成这个返回更大数字的函数！
+    // 但不允许以下方式：
+    // - 调用其它函数
+    // - 额外变量
+    // 执行 `rustex hint if1` 获取提示
 }
 
-// Don't mind this for now :)
+// 暂时不要在意它 :)
 #[cfg(test)]
 mod tests {
     use super::*;

exercise/exercises/if/if2.rs

@@ -1,8 +1,8 @@
 // if2.rs
 
-// Step 1: Make me compile!
-// Step 2: Get the bar_for_fuzz and default_to_baz tests passing!
-// Execute the command `rustlings hint if2` if you want a hint :)
+// 第一步：让我能够编译！
+// 第二步：bar_for_fuzz 和 default_to_baz 可以通过测试！
+// 执行 `rustex hint if2` 获取提示 :)
 
 // I AM NOT DONE
 
@@ -14,7 +14,7 @@ pub fn fizz_if_foo(fizzish: &str) -> &str {
     }
 }
 
-// No test changes needed!
+// 测试不需要更改。
 #[cfg(test)]
 mod tests {
     use super::*;

exercise/info.toml

@@ -128,23 +128,23 @@ name = "if1"
 path = "exercises/if/if1.rs"
 mode = "test"
 hint = """
-It's possible to do this in one line if you would like!
-Some similar examples from other languages:
-- In C(++) this would be: `a > b ? a : b`
-- In Python this would be:  `a if a > b else b`
-Remember in Rust that:
-- the `if` condition does not need to be surrounded by parentheses
-- `if`/`else` conditionals are expressions
-- Each condition is followed by a `{}` block."""
+如果你愿意的话，也可以用一行来做这件事!
+其他语言中的一些类似例子:
+- 在 C(++) 中会是: `a > b ? a : b`
+- 在 Python 中会是:  `a if a > b else b`
+请记住在 Rust 中：
+- `if` 的条件不需要用圆括号括起来
+- `if`/`else` 的条件是表达式
+- 每个条件后面都有一个 `{}` 块。"""
 
 [[exercises]]
 name = "if2"
 path = "exercises/if/if2.rs"
 mode = "test"
 hint = """
-For that first compiler error, it's important in Rust that each conditional
-block return the same type! To get the tests passing, you will need a couple
-conditions checking different input values."""
+对于第一个编译错误，在于 Rust 中的重要一点：
+每个条件块（conditional block）都必须返回相同的类型。
+为了通过测试，你需要几个条件用来判断不同的输入"""
 
 # TEST 1