Data_Structure/作業/unit4/slist_test_file.c

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

struct Node {
    long int id;
    char name[10];
    double score;
    struct Node *next;
};

struct LinkedList {
    struct Node *head;
    struct Node *tail;
};

struct Node* createNode() {
    struct Node* newNode = (struct Node*)malloc(sizeof(struct Node));
    if (newNode == NULL) {
        printf("<EFBFBD>O<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>t<EFBFBD><EFBFBD><EFBFBD><EFBFBD>\n");
        exit(1);
    }
    newNode->next = NULL;
    return newNode;
}

void insertNode(struct LinkedList* list, long int id, const char* name, double score) {
    struct Node* newNode = createNode();
    newNode->id = id;
    strncpy(newNode->name, name, 9);
    newNode->name[9] = '\0';
    newNode->score = score;
    
    if (list->head == NULL) {
        list->head = newNode;
        list->tail = newNode;
    } else {
        list->tail->next = newNode;
        list->tail = newNode;
    }
}

void printList(struct LinkedList* list) {
    struct Node* current = list->head;
    while (current != NULL) {
        printf("<EFBFBD>Ǹ<EFBFBD>: %ld, <20>m<EFBFBD>W: %s, <20><><EFBFBD><EFBFBD>: %.2f\n", current->id, current->name, current->score);
        current = current->next;
    }
}

void freeList(struct LinkedList* list) {
    struct Node* current = list->head;
    while (current != NULL) {
        struct Node* temp = current;
        current = current->next;
        free(temp);
    }
    list->head = NULL;
    list->tail = NULL;
}

void readFromFile(struct LinkedList* list, const char* filename) {
    FILE* file = fopen(filename, "r");
    if (file == NULL) {
        printf("<EFBFBD>L<EFBFBD>k<EFBFBD><EFBFBD><EFBFBD>}<7D>ɮ<EFBFBD> %s\n", filename);
        return;
    }
    
    long int id;
    char name[10];
    double score;
    
    while (fscanf(file, "%ld %9s %lf", &id, name, &score) == 3) {
        insertNode(list, id, name, score);
    }
    
    fclose(file);
}

void saveToFile(struct LinkedList* list, const char* filename) {
    FILE* file = fopen(filename, "w");
    if (file == NULL) {
        printf("<EFBFBD>L<EFBFBD>k<EFBFBD><EFBFBD><EFBFBD>}<7D>ɮ<EFBFBD> %s <20>i<EFBFBD><69><EFBFBD>g<EFBFBD>J\n", filename);
        return;
    }
    
    struct Node* current = list->head;
    while (current != NULL) {
        fprintf(file, "%ld %s %.2f\n", current->id, current->name, current->score);
        current = current->next;
    }
    
    fclose(file);
    printf("<EFBFBD><EFBFBD><EFBFBD>Ƥw<EFBFBD><EFBFBD><EFBFBD>\<EFBFBD>x<EFBFBD>s<EFBFBD><EFBFBD> %s\n", filename);
}

void inputFromKeyboard(struct LinkedList* list) {
    long int id;
    char name[10];
    double score;
    
    printf("<EFBFBD>п<EFBFBD><EFBFBD>J<EFBFBD>Ǹ<EFBFBD>: ");
    scanf("%ld", &id);
    printf("<EFBFBD>п<EFBFBD><EFBFBD>J<EFBFBD>m<EFBFBD>W (<28>̦h9<68>Ӧr<D3A6><72>): ");
    scanf("%9s", name);
    printf("<EFBFBD>п<EFBFBD><EFBFBD>J<EFBFBD><EFBFBD><EFBFBD><EFBFBD>: ");
    scanf("%lf", &score);
    
    insertNode(list, id, name, score);
    printf("<EFBFBD><EFBFBD><EFBFBD>Ƥw<EFBFBD><EFBFBD><EFBFBD>\<EFBFBD>K<EFBFBD>[<5B><><EFBFBD><EFBFBD><EFBFBD>C<EFBFBD><43>\n");
}

void deleteNode(struct LinkedList* list, long int id) {
    struct Node* current = list->head;
    struct Node* prev = NULL;

    // <20>p<EFBFBD>G<EFBFBD>n<EFBFBD>R<EFBFBD><52><EFBFBD><EFBFBD><EFBFBD>O<EFBFBD>Y<EFBFBD>`<60>I
    if (current != NULL && current->id == id) {
        list->head = current->next;
        free(current);
        if (list->head == NULL) {
            list->tail = NULL;  // <20>p<EFBFBD>G<EFBFBD>R<EFBFBD><52><EFBFBD><EFBFBD><EFBFBD>C<EFBFBD><43><EFBFBD><EFBFBD><EFBFBD>šA<C5A1><41><EFBFBD>s tail
        }
        printf("<EFBFBD>Ǹ<EFBFBD><EFBFBD><EFBFBD> %ld <20><><EFBFBD><EFBFBD><EFBFBD>Ƥw<C6A4>R<EFBFBD><52>\n", id);
        return;
    }

    // <20>j<EFBFBD>M<EFBFBD>n<EFBFBD>R<EFBFBD><52><EFBFBD><EFBFBD><EFBFBD>`<60>I
    while (current != NULL && current->id != id) {
        prev = current;
        current = current->next;
    }

    // <20>p<EFBFBD>G<EFBFBD>S<EFBFBD><53><EFBFBD><EFBFBD><EFBFBD>n<EFBFBD>R<EFBFBD><52><EFBFBD><EFBFBD><EFBFBD>`<60>I
    if (current == NULL) {
        printf("<EFBFBD>䤣<EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD><EFBFBD><EFBFBD> %ld <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>\n", id);
        return;
    }

    // <20>R<EFBFBD><52><EFBFBD>`<60>I
    prev->next = current->next;
    if (current == list->tail) {
        list->tail = prev;  // <20>p<EFBFBD>G<EFBFBD>R<EFBFBD><52><EFBFBD><EFBFBD><EFBFBD>O<EFBFBD><4F><EFBFBD>`<60>I<EFBFBD>A<EFBFBD><41><EFBFBD>s tail
    }
    free(current);
    printf("<EFBFBD>Ǹ<EFBFBD><EFBFBD><EFBFBD> %ld <20><><EFBFBD><EFBFBD><EFBFBD>Ƥw<C6A4>R<EFBFBD><52>\n", id);
}

int main() {
    struct LinkedList list = {NULL, NULL};
    int choice;
    long int id_to_delete;
    const char* filename = "list.txt";

    readFromFile(&list, filename);
    
    do {
        printf("\n1. <20><><EFBFBD>ܩҦ<DCA9><D2A6><EFBFBD><EFBFBD><EFBFBD>\n");
        printf("2. <20>q<EFBFBD><71><EFBFBD>L<EFBFBD><4C><EFBFBD>J<EFBFBD>s<EFBFBD><73><EFBFBD><EFBFBD>\n");
        printf("3. <20>R<EFBFBD><52><EFBFBD>S<EFBFBD>w<EFBFBD><77><EFBFBD><EFBFBD>\n");
        printf("4. <20>x<EFBFBD>s<EFBFBD>ðh<C3B0>X\n");
        printf("<EFBFBD>п<EFBFBD><EFBFBD>ܾާ@ (1-4): ");
        scanf("%d", &choice);
        
        switch(choice) {
            case 1:
                printf("\n<EFBFBD>Ҧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:\n");
                printList(&list);
                break;
            case 2:
                inputFromKeyboard(&list);
                break;
            case 3:
                printf("<EFBFBD>п<EFBFBD><EFBFBD>J<EFBFBD>n<EFBFBD>R<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ǹ<EFBFBD>: ");
                scanf("%ld", &id_to_delete);
                deleteNode(&list, id_to_delete);
                break;
            case 4:
                saveToFile(&list, filename);
                break;
            default:
                printf("<EFBFBD>L<EFBFBD>Ī<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܡA<EFBFBD>Э<EFBFBD><EFBFBD>s<EFBFBD><EFBFBD><EFBFBD>J\n");
        }
    } while (choice != 4);
    
    freeList(&list);
    return 0;
}