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学籍管理系统8.cpp

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+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// 定义学生结构体，使用字符串数组来存储学号、班级和姓名
+struct Student {
+    char id[20];
+    char clas[20];
+    char name[20];
+    double score1;
+    double score2;
+    double score3;
+    double score;  // 用于存储总成绩，方便后续排序等操作
+};
+
+// 交换两个学生结构体的函数
+void swap(struct Student *a, struct Student *b) {
+    struct Student temp = *a;
+    *a = *b;
+    *b = temp;
+}
+
+// 计算学生总成绩的函数
+void calculateScore(struct Student *s) {
+    s->score = s->score1 + s->score2 + s->score3;
+}
+
+// 录入学生信息的函数
+void inputStudents(struct Student students[], int *num_students) {
+    char choice[10];
+    do {
+        struct Student new_student;
+        printf("Id ");
+        scanf("%s", new_student.id);
+        printf("class ");
+        scanf("%s", new_student.clas);
+        printf("name ");
+        scanf("%s", new_student.name);
+        printf("score1 ");
+        scanf("%lf", &new_student.score1);
+        printf("score2 ");
+        scanf("%lf", &new_student.score2);
+        printf("score3 ");
+        scanf("%lf", &new_student.score3);
+        calculateScore(&new_student);
+
+        students[*num_students] = new_student;
+        (*num_students)++;
+
+        printf("continue?\n");
+        scanf("%s", choice);
+    } while (strcmp(choice, "yes") == 0);
+}
+void outputStudents(struct Student students[], int num_students) {
+    for (int i = 0; i < num_students; i++) {
+        printf("%s,%s,%s,%.1lf,%.1lf,%.1lf,%.1lf\n", students[i].id, students[i].clas, students[i].name,
+               students[i].score1, students[i].score2, students[i].score3, students[i].score);
+    }
+}
+// 根据学号或姓名删除学生信息的函数
+void deleteStudents(struct Student students[], int *num_students, char target[20]) {
+    int found = 0;
+    for (int i = 0; i < *num_students; i++) {
+        if (strcmp(students[i].id, target) == 0 || strcmp(students[i].name, target) == 0) {
+            found = 1;
+            for (int j = i; j < *num_students - 1; j++) {
+                students[j] = students[j + 1];
+            }
+            (*num_students)--;
+            i--;  // 因为删除元素后，当前位置元素改变了，需要重新检查当前位置
+        }
+    }
+    if (!found) {
+        // 如果没找到要删除的学生，原样输出所有学生信息
+        outputStudents(students, *num_students);
+    } else {
+        outputStudents(students, *num_students);
+    }
+}
+
+// 根据学号或班级查询学生信息的函数
+void selectStudents(struct Student students[], int num_students, char target[20]) {
+    int found = 0;
+    for (int i = 0; i < num_students; i++) {
+        if (strcmp(students[i].id, target) == 0 || strcmp(students[i].clas, target) == 0) {
+            found = 1;
+            printf("%s,%s,%s,%.1lf,%.1lf,%.1lf,%.1lf\n", students[i].id, students[i].clas, students[i].name,
+                   students[i].score1, students[i].score2, students[i].score3, students[i].score);
+        }
+    }
+    if (!found) {
+        printf("there is no eligible student\n");
+    }
+}
+
+// 按照班级从小到大，同一班级内总成绩从大到小排序学生信息的函数
+void orderStudents(struct Student students[], int num_students) {
+    for (int i = 0; i < num_students - 1; i++) {
+        for (int j = 0; j < num_students - i - 1; j++) {
+            if (strcmp(students[j].clas, students[j + 1].clas) > 0) {
+                swap(&students[j], &students[j + 1]);
+            } else if (strcmp(students[j].clas, students[j + 1].clas) == 0) {
+                if (students[j].score < students[j + 1].score) {
+                    swap(&students[j], &students[j + 1]);
+                }
+            }
+        }
+    }
+}
+
+// 输出学生信息的函数
+
+
+int main() {
+    struct Student students[100];  // 假设最多存储100个学生信息，可根据实际情况调整大小
+    int num_students = 0;
+
+    int option;
+    while (1) {
+        printf("1.input\n2.delete\n3.select\n4.order\n5.output\n6.quit\nplease input your option\n");
+        scanf("%d", &option);
+
+        switch (option) {
+            case 1:
+                inputStudents(students, &num_students);
+                break;
+            case 2: {
+                char target[20];
+                scanf("%s", target);
+                deleteStudents(students, &num_students, target);
+            }
+                break;
+            case 3: {
+                char target[20];
+                scanf("%s", target);
+                selectStudents(students, num_students, target);
+            }
+                break;
+            case 4:
+                orderStudents(students, num_students);
+                break;
+            case 5:
+                outputStudents(students, num_students);
+                break;
+            case 6:
+                return 0;
+            default:
+                printf("wuxiao\n");
+        }
+    }
+
+    return 0;
+}