drliyahua/step9.cpp

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

typedef struct Node {
    char stus[100];
    int classes;
    char names[100];
    double mathGrade;
    double physicsGrade;
    double englishGrade;
    int boolNew;
    struct Node* next;
} Node;

Node* head = NULL;

Node* createNode() {
    Node* newNode = (Node*)malloc(sizeof(Node));
    newNode->next = NULL;
    return newNode;
}

void input(Node* node) {
    printf("Id ");
    scanf("%s", node->stus);
    printf("class ");
    scanf("%d", &node->classes);
    printf("name ");
    scanf("%s", node->names);
    printf("score1 ");
    scanf("%lf", &node->mathGrade);
    printf("score2 ");
    scanf("%lf", &node->physicsGrade);
    printf("score3 ");
    scanf("%lf", &node->englishGrade);
    node->boolNew = 0;
}

void inputStudentInformation() {
    char a[10];
    do {
        Node* newNode = createNode();
        input(newNode);
        newNode->next = head;
        head = newNode;
        printf("One student has been input!\n");
        printf("continue?(yes/no)\n");
        scanf("%s", a);
    } while (strcmp(a, "no") != 0);
}

void insertedNew() {
    Node* newNode = createNode();
    input(newNode);
    newNode->boolNew = 1;
    newNode->next = head;
    head = newNode;
    printf("One student has been input!\n");
}

void informationClear(char a[100]) {
    Node** current = &head;
    while (*current) {
        Node* entry = *current;
        if (strcmp(entry->stus, a) == 0 || strcmp(entry->names, a) == 0) {
            *current = entry->next;
            free(entry);
        }
        else {
            current = &entry->next;
        }
    }
}

void sortStudents() {
    Node* sorted = NULL;
    Node* current = head;
    while (current) {
        Node* next = current->next;
        if (!sorted || current->classes < sorted->classes ||
            (current->classes == sorted->classes &&
                current->mathGrade + current->physicsGrade + current->englishGrade >=
                sorted->mathGrade + sorted->physicsGrade + sorted->englishGrade)) {
            current->next = sorted;
            sorted = current;
        }
        else {
            Node* temp = sorted;
            while (temp->next &&
                (temp->next->classes < current->classes ||
                    (temp->next->classes == current->classes &&
                        temp->next->mathGrade + temp->next->physicsGrade + temp->next->englishGrade >=
                        current->mathGrade + current->physicsGrade + current->englishGrade))) {
                temp = temp->next;
            }
            current->next = temp->next;
            temp->next = current;
        }
        current = next;
    }
    head = sorted;
    printf("Students have been sorted!\n");
}

void printStudentOriginalScore() {
    Node* current = head;
    int classs = 0;
    while (current) {
        if (current->classes != classs) {
            printf("%d  %s  %s  %.1f  %.1f  %.1f  %s\n",
                current->classes, current->stus, current->names,
                current->mathGrade, current->physicsGrade, current->englishGrade,
                current->boolNew == 0 ? "" : current->boolNew == 1 ? "inserted" : "modified");
        }
        else {
            printf("    %s  %s  %.1f  %.1f  %.1f  %s\n",
                current->stus, current->names,
                current->mathGrade, current->physicsGrade, current->englishGrade,
                current->boolNew == 0 ? "" : current->boolNew == 1 ? "inserted" : "modified");
        }
        classs = current->classes;
        current->boolNew = 0;
        current = current->next;
    }
}

void modifyStudent() {
    char a[10];
    printf("Are you sure(yes/no) ");
    scanf("%s", a);
    if (strcmp(a, "yes") == 0) {
        char stusToModify[10];
        printf("Enter the student number to modify, followed by new data ( 10001 2 Kobe 59 59 59):\n");
        scanf("%s", stusToModify);

        Node* current = head;
        while (current) {
            if (strcmp(current->stus, stusToModify) == 0) {
                scanf("%d %s %lf %lf %lf",
                    &current->classes, current->names,
                    &current->mathGrade, &current->physicsGrade, &current->englishGrade);
                current->boolNew = 2;
                printf("Student data modified successfully!\n");
                return;
            }
            current = current->next;
        }
        printf("Student with number %s not found.\n", stusToModify);
    }
}

int manage() {
    printf("1.input\n2.delete\n3.select\n4.order\n5.output\n6.quit\nPlease input your option: ");
    char keywords;
    scanf(" %c", &keywords);
    switch (keywords) {
    case '1':
        inputStudentInformation();
        return 0;
    case '2': {
        char a[100];
        printf("Please enter student's ID or Name: ");
        scanf("%s", a);
        informationClear(a);
        return 0;
    }
    case '3':
        printStudentOriginalScore();
        return 0;
    case '4':
        sortStudents();
        printStudentOriginalScore();
        return 0;
    case '5':
        printStudentOriginalScore();
        return 0;
    case '6':
        return 1;
    default:
        printf("Invalid option. Please try again.\n");
        return 0;
    }
}

int main() {
    while (manage() == 0) {
    }
    return 0;
}