diff --git a/step5.c b/step5.c
new file mode 100644
index 0000000..9b968bd
--- /dev/null
+++ b/step5.c
@@ -0,0 +1,84 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define N 3
+#define MAX_NAME_LENGTH 20
+
+struct student {
+    int id;
+    int clas;
+    char name[MAX_NAME_LENGTH];
+    float math, physics, english, total;
+};
+
+void displayStudents(struct student stu[], int size) {
+    printf("学号\t班级\t姓名\t数学\t物理\t英语\t总成绩\n");
+    for (int i = 0; i < size; i++) {
+        printf("%d\t%d\t%s\t%.1f\t%.1f\t%.1f\t%.1f\n",
+            stu[i].id, stu[i].clas, stu[i].name, stu[i].math, stu[i].physics, stu[i].english, stu[i].total);
+    }
+    printf("\n");
+}
+
+void deleteStudent(struct student stu[], int* size, int index) {
+    for (int i = index; i < *size - 1; i++) {
+        stu[i] = stu[i + 1];
+    }
+    (*size)--;
+}
+
+int main() {
+    struct student stu[N] = {
+        {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 size = N;
+
+    printf("初始学生信息：\n");
+    displayStudents(stu, size);
+
+    char userInput[MAX_NAME_LENGTH];
+    int deleteIndex = -1;
+
+    printf("请输入要删除的学生的学号或姓名：");
+    scanf("%s", userInput);
+
+    for (int i = 0; i < size; i++) {
+        if (strcmp(stu[i].name, userInput) == 0 || stu[i].id == atoi(userInput)) {
+            deleteIndex = i;
+            break;
+        }
+    }
+
+    if (deleteIndex == -1) {
+        printf("未找到匹配的学生信息，程序退出。\n");
+        return 0;
+    }
+    else {
+        printf("找到匹配的学生信息，删除该学生。\n");
+        deleteStudent(stu, &size, deleteIndex);
+    }
+
+    char choice;
+    printf("Are you sure(y/n)? ");
+    scanf(" %c", &choice);
+
+    if (choice == 'n') {
+        // 用户选择不删除，输出排序后的学生信息并退出程序
+        displayStudents(stu, size);
+    }
+    else if (choice == 'y') {
+        // 用户选择删除，直接退出程序
+        printf("程序结束。\n");
+    }
+    else {
+        // 无效输入，输出排序后的学生信息并退出程序
+        printf("无效输入，输出排序后的学生信息。\n");
+        displayStudents(stu, size);
+    }
+
+    return 0;
+}