Update random.md

diff --git a/docs/misc/random.md b/docs/misc/random.md
index 27facd7..bd6cf04 100644 (file)
--- a/docs/misc/random.md
+++ b/docs/misc/random.md
@@ -33,18 +33,20 @@
 
 #### 示例
 
-    #include<ctime>
-    #include<iostream>
-    #include<random>
-     
-    using namespace std;
-     
-    int main()
-    {
-        mt19937 myrand(time(0));
-        cout<<myrand()<<endl;
-        return 0;
-    }
+```cpp
+#include<ctime>
+#include<iostream>
+#include<random>
+
+using namespace std;
+
+int main()
+{
+    mt19937 myrand(time(0));
+    cout<<myrand()<<endl;
+    return 0;
+}
+```
 
 ### random_shuffle