diff --git a/problems/0028.实现strStr().md b/problems/0028.实现strStr().md
index c00ef423..ee702e4d 100644
--- a/problems/0028.实现strStr().md
+++ b/problems/0028.实现strStr().md
@@ -15,10 +15,12 @@ public:
         next[0] = -1;
         int j = -1;
         for(int i = 1; i < s.size(); i++){
-            while(j >= 0 && s[i] != s[j+1])
+            while (j >= 0 && s[i] != s[j + 1]) {
                 j = next[j];
-            if(s[i] == s[j+1])
+            }
+            if (s[i] == s[j + 1]) {
                 j++;
+            }
             next[i] = j;
         }
     }
@@ -37,7 +39,7 @@ public:
             if (haystack[i] == needle[j + 1]) {
                 j++;
             }
-            if (j == (needle.size() -1) ) {
+            if (j == (needle.size() - 1) ) {
                 return (i - needle.size() + 1);
             }
         }