diff --git a/README.md b/README.md
index a848ac6..8560da6 100644
--- a/README.md
+++ b/README.md
@@ -373,4 +373,8 @@ void createjz(){//创建邻接矩阵函数
 
 
  ![C2](images/chuangjian.svg)
-C3:void createjz();
\ No newline at end of file
+ C3:void createjz();
+ ![c3](images/printf.svg)
+C4:void printf();
+![C2](images/suanfa.svg)
+ C3:void Dijkstra(int v1,int v2);