diff --git a/problems/0704.二分查找.md b/problems/0704.二分查找.md
index 012e4066..472459de 100644
--- a/problems/0704.二分查找.md
+++ b/problems/0704.二分查找.md
@@ -515,8 +515,8 @@ impl Solution {
 ```
 
 **C:**
-```
-//C (版本一) 左闭右闭区间 [left, right]
+```c
+## (版本一) 左闭右闭区间 [left, right]
 int search(int* nums, int numsSize, int target){
     int left = 0;
     int right = numsSize-1;
@@ -542,8 +542,8 @@ int search(int* nums, int numsSize, int target){
     return -1;
 }
 ```
-```
-C (版本二) 左闭右开区间 [left, right)
+```C
+##(版本二) 左闭右开区间 [left, right)
 int search(int* nums, int numsSize, int target){
     int length = numsSize;
     int left = 0;