diff --git a/5.c b/5.c
new file mode 100644
index 0000000..23fbb0f
--- /dev/null
+++ b/5.c
@@ -0,0 +1,85 @@
+#include <stdio.h>
+#include <string.h>
+
+struct s
+{
+    char id[20];
+    int class;         // 学号
+    char name[20];
+    float m, p, e;   // 总成绩
+};
+
+void deleteAndShowStudent()
+{
+    struct s stu[3] = {
+        {"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}
+    };
+    struct s stu2[3] = {
+        {"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 numStudents = 3;
+
+    char input[20];
+    scanf("%s", input);
+    int found = 0;
+    int i,j;
+    for ( i = 0; i < numStudents; i++)
+    {
+        if (strcmp(stu[i].id, input) == 0 || strcmp(stu[i].name, input) == 0)
+        {
+            found = 1;
+            for ( j = i; j < numStudents - 1; j++)
+            {
+                stu[j] = stu[j + 1];
+            }
+            numStudents--;
+            break;
+        }
+    }
+
+    if (found)
+    {
+       
+        for ( i = 0; i < numStudents; i++)
+        {
+            printf("%s %d %s %.1f %.1f %.1f\n", stu[i].id, stu[i].class, stu[i].name, stu[i].m, stu[i].p, stu[i].e);
+        }
+        char confirm[5];
+        printf("Are you sure to delete? (yes/no): ");
+        fflush(stdin); // 清空输入缓冲区
+        fgets(confirm, sizeof(confirm), stdin); // 使用fgets来获取用户输入
+        confirm[strcspn(confirm, "\n")] = '\0'; // 去掉输入中的换行符
+        if (strcmp(confirm,"y") == 0)
+        {
+            return;
+        }
+        else if (strcmp(confirm,"n") == 0)
+        {
+            for ( i = 0; i < numStudents+1; i++)
+            {
+                printf("%s %d %s %.1f %.1f %.1f\n", stu2[i].id, stu2[i].class, stu2[i].name, stu2[i].m, stu2[i].p, stu2[i].e);
+            }
+            return;
+        }
+    }
+    else
+    {
+        for (i = 0; i < numStudents; i++)
+        {
+            printf("%s %d %s %.1f %.1f %.1f\n", stu[i].id, stu[i].class, stu[i].name, stu[i].m, stu[i].p, stu[i].e);
+        }
+        return;
+    }
+}
+
+int main()
+{
+    deleteAndShowStudent();
+   // getchar();
+    return 0;
+}
+