Merge pull request #665 from andywang0607/704_rust

增加0704.二分查找 Rust語言實現

problems/0704.二分查找.md

@@ -406,6 +406,49 @@ func search(nums: [Int], target: Int) -> Int {
 
 ```
 
+**Rust:**
+
+```rust
+# （版本一）左闭右闭区间
+
+impl Solution {
+    pub fn search(nums: Vec<i32>, target: i32) -> i32 {
+        let mut left:usize = 0;
+        let mut right:usize = nums.len() - 1;
+        while left as i32 <= right as i32{
+            let mid = (left + right) / 2;
+            if nums[mid] < target {
+                left = mid + 1;
+            } else if nums[mid] > target {
+                right = mid - 1;
+            } else {
+                return mid as i32;
+            }
+        }
+        -1
+    }
+}
+
+# （版本二）左闭右开区间
+
+impl Solution {
+    pub fn search(nums: Vec<i32>, target: i32) -> i32 {
+        let mut left:usize = 0;
+        let mut right:usize = nums.len();
+        while left < right {
+            let mid = (left + right) / 2;
+            if nums[mid] < target {
+                left = mid + 1;
+            } else if nums[mid] > target {
+                right = mid;
+            } else {
+                return mid as i32;
+            }
+        }
+        -1
+    }
+}
+```
 
 
 -----------------------