diff --git a/chengxu4(1).cpp b/chengxu4(1).cpp
new file mode 100644
index 0000000..1acdf6a
--- /dev/null
+++ b/chengxu4(1).cpp
@@ -0,0 +1,70 @@
+#include <stdio.h>
+
+struct Student {
+    int student_id;
+    int class_id;
+    float math_score;
+    float physics_score;
+    float english_score;   
+};
+
+
+
+int main() {
+    struct Student students[4] = {
+        {10001, 11, 99.5, 88.5, 89.5},
+        {10002, 12, 77.9, 56.5, 87.5},
+        {10003, 11, 92.5, 99.0, 60.5}
+    };
+
+    int new_student_id, new_class_id;
+    float new_math_score, new_physics_score, new_english_score;
+
+    scanf("%d %d %f %f %f", &new_student_id, &new_class_id, &new_math_score, &new_physics_score, &new_english_score);
+
+    // 检查新输入的学号是否已存在
+    int exist = 0;
+    for (int i = 0; i < 3; i++) {
+        if (new_student_id == students[i].student_id) {
+            exist = 1;
+            break;
+        }
+    }
+
+    if (exist == 1) {
+        printf("已存在学号的信息\n");
+    } else {
+        students[3].student_id = new_student_id;
+        students[3].class_id = new_class_id;
+        students[3].math_score = new_math_score;
+        students[3].physics_score = new_physics_score;
+        students[3].english_score = new_english_score;
+
+        // 插入排序，按班级和总成绩进行排序
+        for (int i = 1; i < 4; i++) {
+            struct Student temp = students[i];
+            int j = i - 1;
+            while (j >= 0 && (temp.class_id < students[j].class_id || (temp.class_id == students[j].class_id && temp.math_score + temp.physics_score + temp.english_score > students[j].math_score + students[j].physics_score + students[j].english_score))) {
+                students[j + 1] = students[j];
+                j--;
+            }
+            students[j + 1] = temp;
+        }
+
+       
+    }
+    
+     for (int i = 0; i < 4; i++) {
+	    	if(students[i].student_id==new_student_id)
+	    	{
+		        printf("%d %d %.1f %.1f %.1f inserted\n", students[i].student_id, students[i].class_id,
+		               students[i].math_score, students[i].physics_score, students[i].english_score);
+	    	}
+	    	else{
+				 printf("%d %d %.1f %.1f %.1f\n", students[i].student_id, students[i].class_id,
+				               students[i].math_score, students[i].physics_score, students[i].english_score);
+			}
+     }
+    return 0;
+    
+}