diff --git a/README.md b/README.md
index 73471c8..8da0a82 100644
--- a/README.md
+++ b/README.md
@@ -34,9 +34,18 @@ int main()
 		float yy;
 		float add;
 	}student1, student2, student3;
-	scanf_s("%d%f%f%f", &student1.number, &student1.gaoshu, &student1.dawu, &student1.yy);
-	scanf_s("%d%f%f%f", &student2.number, &student2.gaoshu, &student2.dawu, &student2.yy);
-	scanf_s("%d%f%f%f", &student3.number, &student3.gaoshu, &student3.dawu, &student3.yy);
+	scanf("%d",&student1.number);
+scanf("%f",&student1.gaoshu);
+scanf("%f",&student1.dawu);
+scanf("%f",&student1.yy);
+scanf("%d",&student2.number);
+scanf("%f",&student2.gaoshu);
+scanf("%f",&student2.dawu);
+scanf("%f",&student2.yy);
+scanf("%d",&student3.number);
+scanf("%f",&student3.gaoshu);
+scanf("%f",&student3.dawu);
+scanf("%f",&student3.yy);
 	student1.add = (student1.gaoshu + student1.dawu + student1.yy);
 	student2.add = (student2.gaoshu + student2.dawu + student2.yy);
 	student3.add = (student3.gaoshu + student3.dawu + student3.yy);
@@ -46,3 +55,70 @@ printf("%d  %f  %f  %f  %f\n", student2.number, student2.gaoshu, student2.dawu,
 
 printf("%d  %f  %f  %f  %f\n", student3.number, student3.gaoshu, student3.dawu, student3.yy, student3.add);
 }
+步骤3
+int main()
+{
+    char controll;
+    char arr1[] = { "                              1.Input" };
+    char arr2[] = { "                              2.Output" };
+    char arr3[] = { "                              3.Order" };
+    char arr4[] = { "                              4.Quit" };
+    char arr5[] = { "Please input info of the three students:" };
+    char arr7[] = { "You are trying to Make things ordered" };
+    char arr8[] = { "You are about to Quit" };
+    printf("%s\n%s\n%s\n%s\n", arr1, arr2, arr3, arr4);
+    scanf_s("%c", &controll);
+    switch (controll) {
+    case 'i':printf("\n%s\n", arr5); break;
+    case 'm':printf("\n%s\n", arr7); break;
+    case 'q':printf("\n%s\n", arr8); break;
+    default:printf("Wrong input");
+    }
+            struct student
+            {
+                int number;
+                float gaoshu;
+                float dawu;
+                float yy;
+                float add;
+                float aver;
+            }student1, student2, student3,studenttemp;
+scanf("%d",&student1.number);
+scanf("%f",&student1.gaoshu);
+scanf("%f",&student1.dawu);
+scanf("%f",&student1.yy);
+scanf("%d",&student2.number);
+scanf("%f",&student2.gaoshu);
+scanf("%f",&student2.dawu);
+scanf("%f",&student2.yy);
+scanf("%d",&student3.number);
+scanf("%f",&student3.gaoshu);
+scanf("%f",&student3.dawu);
+scanf("%f",&student3.yy);
+            student1.add = (student1.gaoshu + student1.dawu + student1.yy);
+            student2.add = (student2.gaoshu + student2.dawu + student2.yy);
+            student3.add = (student3.gaoshu + student3.dawu + student3.yy);
+            student1.aver = student1.add / 3;
+            student2.aver = student2.add / 3;
+            student3.aver = student3.add / 3;
+            if (student1.add > student2.add) {
+                studenttemp = student1;
+                student1 = student2;
+                student2 = studenttemp;
+         }
+            if (student1.add > student3.add) {
+                studenttemp = student1;
+                student1 = student3;
+                student3 = studenttemp;
+            }
+            if (student2.add > student3.add) {
+                studenttemp = student2;
+                student2 = student3;
+                student3 = studenttemp;
+            }
+            printf("%d,%.1f,%.1f\n", student1.number, student1.add, student1.aver);
+            printf("%d,%.1f,%.1f\n", student2.number, student2.add, student2.aver);
+            printf("%d,%.1f,%.1f\n", student3.number, student3.add, student3.aver);
+    
+   
+}
\ No newline at end of file