diff --git a/步骤六.c b/步骤六.c
new file mode 100644
index 0000000..1529a64
--- /dev/null
+++ b/步骤六.c
@@ -0,0 +1,83 @@
+#include <stdio.h>
+#include <string.h>
+
+#define MAX_STUDENTS 3
+#define MAX_NAME_LENGTH 20
+
+struct Student {
+    char id[MAX_NAME_LENGTH];
+    int class;
+    char name[MAX_NAME_LENGTH];
+    float score1;
+    float score2;
+    float score3;
+};
+
+void printStudent(struct Student student, int isFirst) {
+    if (isFirst) {
+        printf("%d %s %s %.1f %.1f %.1f\n", student.class, student.id, student.name, student.score1, student.score2, student.score3);
+    } else {
+        printf("   %s %s %.1f %.1f %.1f\n", student.id, student.name, student.score1, student.score2, student.score3);
+    }
+}
+
+void printAllStudents(struct Student students[], int count) {
+    int isFirst = 1;
+    for (int i = 0; i < count; i++) {
+        printStudent(students[i], isFirst);
+        isFirst = 0;
+    }
+}
+
+int findStudent(struct Student students[], int count, char* search) {
+    for (int i = 0; i < count; i++) {
+        if (strcmp(students[i].id, search) == 0) {
+            return i;
+        }
+    }
+    return -1;
+}
+
+void sortStudents(struct Student students[], int count) {
+    int i, j;
+    struct Student temp;
+    for (i = 0; i < count - 1; i++) {
+        for (j = 0; j < count - i - 1; j++) {
+            if (students[j].class > students[j + 1].class ||
+                (students[j].class == students[j + 1].class && students[j].score1 + students[j].score2 + students[j].score3 < students[j + 1].score1 + students[j + 1].score2 + students[j + 1].score3)) {
+                temp = students[j];
+                students[j] = students[j + 1];
+                students[j + 1] = temp;
+            }
+        }
+    }
+}
+
+int main() {
+struct Student students[MAX_STUDENTS] = {
+        {"10001", 11, "Zhang", 99.5, 88.5, 89.5},
+        {"10002", 12, "Yang", 77.9, 56.5, 87.5},
+        {"10003", 11, "Liang", 92.5, 99.0, 60.5}
+    };
+    int studentCount = MAX_STUDENTS;
+
+    char search[MAX_NAME_LENGTH];
+    printf("Enter student ID to modify: ");
+    scanf("%s", search);
+
+    int index = findStudent(students, studentCount, search);
+    if (index != -1) {
+        printf("Enter updated student information (class id name score1 score2 score3): ");
+        scanf("%d %s %s %f %f %f", &students[index].class, students[index].id, students[index].name, &students[index].score1, &students[index].score2, &students[index].score3);
+
+        sortStudents(students, studentCount);
+        printAllStudents(students, studentCount);
+
+        printf("modified\n");
+    } else {
+        printf("Student not found.\n");
+        printAllStudents(students, studentCount);
+    }
+
+    return 0;
+}