diff --git a/步骤三.c b/步骤三.c
new file mode 100644
index 0000000..32c9d35
--- /dev/null
+++ b/步骤三.c
@@ -0,0 +1,68 @@
+#include <stdio.h>
+int main() {
+    char choice;
+    int student_id[3];
+    float math_score[3], physics_score[3], english_score[3], total_score[3], average_score[3];
+
+    printf("                              1.Input\n");
+    printf("                              2.Output\n");
+    printf("                              3.Order\n");
+    printf("                              4.Quit\n");
+    printf("Please enter your choice: ");
+    scanf(" %c", &choice);
+
+    switch (choice) {
+        case 'i':
+            printf("Please input info of the three students:\n");
+            for (int i = 0; i < 3; i++) {
+                printf("Enter student %d's ID: ", i + 1);
+                scanf("%d", &student_id[i]);
+                printf("Enter student %d's math score: ", i + 1);
+                scanf("%f", &math_score[i]);
+                printf("Enter student %d's physics score: ", i + 1);
+                scanf("%f", &physics_score[i]);
+                printf("Enter student %d's english score: ", i + 1);
+                scanf("%f", &english_score[i]);
+                total_score[i] = math_score[i] + physics_score[i] + english_score[i];
+                average_score[i] = total_score[i] / 3;
+            }
+
+            // Sort by total score
+            for (int i = 0; i < 2; i++) {
+                for (int j = 0; j < 2 - i; j++) {
+                    if (total_score[j] > total_score[j + 1]) {
+                        // Swap total score
+                        float temp_total = total_score[j];
+                        total_score[j] = total_score[j + 1];
+                        total_score[j + 1] = temp_total;
+
+                        // Swap student ID
+                        int temp_id = student_id[j];
+                        student_id[j] = student_id[j + 1];
+                        student_id[j + 1] = temp_id;
+
+                        // Swap average score
+                        float temp_average = average_score[j];
+                        average_score[j] = average_score[j + 1];
+                        average_score[j + 1] = temp_average;
+                    }
+                }
+            }
+
+            // Output sorted student information
+            for (int i = 0; i < 3; i++) {
+                printf("%d,%.1f,%.1f\n", student_id[i], total_score[i], average_score[i]);
+            }
+            break;
+        case 'm':
+            printf("You are trying to Make things ordered\n");
+            break;
+        case 'q':
+            printf("You are about to Quit\n");
+            break;
+        default:
+            printf("Wrong input\n");
+    }
+
+    return 0;
+}