ADD file via upload

cs5.cpp

@@ -0,0 +1,75 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#define MAX_STUDENTS 100
+#define NAME_LEN 50
+typedef struct {
+    char id[10];      
+    int classs;         
+    char name[NAME_LEN]; 
+    float scores[3];   
+} Student;
+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 student_count = 3;
+int compare_students(const void *a, const void *b) {
+    Student *student_a = (Student *)a;
+    Student *student_b = (Student *)b;
+    if (student_a->classs != student_b->classs) {
+        return student_a->classs - student_b->classs;
+    }
+    float total_a = student_a->scores[0] + student_a->scores[1] + student_a->scores[2];
+    float total_b = student_b->scores[0] + student_b->scores[1] + student_b->scores[2];
+
+    return total_b - total_a; 
+}
+int find_student(char *key) {
+    int i;for ( i = 0; i < student_count; i++) {
+        if (strcmp(students[i].id, key) == 0 || strcmp(students[i].name, key) == 0) {
+            return i;
+        }
+    }
+    return -1;
+}
+void delete_student(int index) {
+    int i ;for ( i = index; i < student_count - 1; i++) {
+        students[i] = students[i + 1];
+    }
+    student_count--;
+}
+void display_students() {
+    qsort(students, student_count, sizeof(Student), compare_students);
+    int i;for (i = 0; i < student_count; i++) {
+        printf("%s %d %s %.1f %.1f %.1f\n", students[i].id, students[i].classs, students[i].name,
+               students[i].scores[0], students[i].scores[1], students[i].scores[2]);
+    }
+}
+int main() {
+    char key[NAME_LEN];
+    printf("Enter the student ID or name to delete: ");
+    scanf("%s", key);
+
+    int index = find_student(key);
+    if (index == -1) {
+        printf("Student not found.\n");
+        display_students();
+        return 0;
+    }
+    printf("Are you sure (yes/no)? ");
+    char confirm[5];
+    scanf("%s", confirm);
+
+    if (strcmp(confirm, "yes") == 0) {
+        
+        delete_student(index);
+         display_students();
+    } else {
+        display_students();
+    }
+    return 0;
+}
+
+