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xuejiguanli.cpp

@@ -0,0 +1,149 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_STUDENTS 100
+#define MAX_LEN 20
+
+struct Student {
+    char id[MAX_LEN];
+    char clas[MAX_LEN];
+    char name[MAX_LEN];
+    double score1;
+    double score2;
+    double score3;
+    double score;
+} students[MAX_STUDENTS];
+int studentCount = 0;
+
+void inputStudent() {
+    if (studentCount >= MAX_STUDENTS) {
+        printf("Database is full.\n");
+        return;
+    }
+    struct Student s;
+    printf("Id: ");
+    scanf("%s", s.id);
+    printf("class: ");
+    scanf("%s", s.clas);
+    printf("name: ");
+    scanf("%s", s.name);
+    printf("score1: ");
+    scanf("%lf", &s.score1);
+    printf("score2: ");
+    scanf("%lf", &s.score2);
+    printf("score3: ");
+    scanf("%lf", &s.score3);
+    s.score = s.score1 + s.score2 + s.score3;
+    students[studentCount++] = s;
+    printf("continue? (yes/no): ");
+    char cont[3];
+    scanf("%s", cont);
+    if (strcmp(cont, "no") == 0 || strcmp(cont, "No") == 0 || strcmp(cont, "NO") == 0) {
+        return;
+    }
+    else
+    {
+    	inputStudent() ;
+	}
+	return;
+}
+
+void deleteStudent() {
+    char searchIdOrName[MAX_LEN];
+    printf("Enter student id or name to delete: ");
+    scanf("%s", searchIdOrName);
+    int found = 0;
+    for (int i = 0; i < studentCount; i++) {
+        if (strcmp(students[i].id, searchIdOrName) == 0 || strcmp(students[i].name, searchIdOrName) == 0) {
+            for (int j = i; j < studentCount - 1; j++) {
+                students[j] = students[j + 1];
+            }
+            studentCount--;
+            found = 1;
+            i--;
+        }
+    }
+    if (!found) {
+        printf("There is no eligible student.\n");
+    }
+    printf("continue? (yes/no): ");
+    char cont[3];
+    scanf("%s", cont);
+    if (strcmp(cont, "no") != 0) {
+        deleteStudent();
+    }
+}
+
+void selectStudent() {
+    char searchIdOrClass[MAX_LEN];
+    printf("Enter student id or class to select: ");
+    scanf("%s", searchIdOrClass);
+    int found = 0;
+    for (int i = 0; i < studentCount; i++) {
+        if (strcmp(students[i].id, searchIdOrClass) == 0 || strcmp(students[i].clas, searchIdOrClass) == 0) {
+            printf("%s,%s,%s,%.1f,%.1f,%.1f,%.1f\n", students[i].id, students[i].clas, students[i].name, students[i].score1, students[i].score2, students[i].score3, students[i].score);
+            found = 1;
+        }
+    }
+    if (!found) {
+        printf("There is no eligible student.\n");
+    }
+    printf("continue? (yes/no): ");
+    char cont[3];
+    scanf("%s", cont);
+    if (strcmp(cont, "yes") == 0 || strcmp(cont, "Yes") == 0 || strcmp(cont, "YES") == 0) {
+        selectStudent();
+    }
+}
+
+void orderStudents() {
+    // Simple bubble sort for demonstration purposes
+    for (int i = 0; i < studentCount - 1; i++) {
+        for (int j = 0; j < studentCount - i - 1; j++) {
+            if (strcmp(students[j].clas, students[j + 1].clas) > 0 ||
+                (strcmp(students[j].clas, students[j + 1].clas) == 0 && students[j].score < students[j + 1].score)) {
+                struct Student temp = students[j];
+                students[j] = students[j + 1];
+                students[j + 1] = temp;
+            }
+        }
+    }
+}
+
+void outputStudents() {
+    for (int i = 0; i < studentCount; i++) {
+        printf("%s,%s,%s,%.1f,%.1f,%.1f,%.1f\n", students[i].id, students[i].clas, students[i].name, students[i].score1, students[i].score2, students[i].score3, students[i].score);
+    }
+}
+
+int main() {
+    int option;
+    do {
+        printf("1.input\n2.delete\n3.select\n4.order\n5.output\n6.quit\nplease input your option: ");
+        scanf("%d", &option);
+        switch (option) {
+            case 1:
+                inputStudent();
+                break;
+            case 2:
+                deleteStudent();
+                break;
+            case 3:
+                selectStudent();
+                break;
+            case 4:
+                orderStudents();
+                break;
+            case 5:
+                outputStudents();
+                break;
+            case 6:
+                printf("Exiting program.\n");
+                break;
+            default:
+                printf("Invalid option.\n");
+        }
+    } while (option != 6);
+    return 0;
+}