diff --git a/README.md b/README.md
index 75ae569..b4fbb69 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,21 @@
-# v.2
+#include<stdio.h>
+int main()
+{
+    printf("                              1.Input\n");//步骤一;
+    printf("                              2.Output\n");
+    printf("                              3.Order\n");
+    printf("                              4.Quit\n");
+    char a;
+    scanf("%c",&a);
+    switch (a)
+    {
+        case 'i':printf("You are trying to Input info");break;
+        case 'o':printf("You are trying to Output info");break;
+        case 'm':printf("You are trying to Make things ordered");break;
+        case 'q':printf("You are trying to Quit");break;
+        default:printf("Wrong input");
+        return 0;
+    }
+}
+