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

typedef struct student {
    char name[20]; //姓名
    char age[10]; //年龄
    char sex[10]; //性别
    char num[20]; //学号
    char add[40]; //住址
    int score; //成绩
    struct student* next;
} stu;

void welcome()
{
    printf("****************【Student Manager】*************\n");
    printf("*                                                  \n");
    printf("*                                                  \n");
    printf("*                  1.New                  \n");
    printf("*                  2.Del                  \n");
    printf("*                  3.Edit                  \n");
    printf("*                  4.Show All                  \n");
    printf("*                  5.Search                  \n");
    printf("*                  6.Save                  \n");
    printf("*                  7.Sort                   \n");
    printf("*                  8.Read                  \n");
    printf("*                  9.Exit                     \n");
    printf("*                                                  \n");
    printf("*                                                  \n");
    printf("***********************************************\n");
}

void tuichu()
{
    printf("\nSee you next time!\n");
    exit(0);
}

void creat(stu* head)
{
    stu* p = head;
    stu* p1 = (student*)malloc(sizeof(student));
    printf("\nAdding info\n");
    printf("Name:\n");
    scanf("%s", p1->name);
    printf("Sex:\n");
    scanf("%s", p1->sex);
    printf("Age:\n");
    scanf("%s", p1->age);
    printf("Id:\n");
    scanf("%s", p1->num);
    printf("Score\n");
    scanf("%d", &p1->score);
    printf("Address\n");
    scanf("%s", p1->add);
    while (p->next != NULL) {
        p = p->next;
        if (strcmp(p1->num, p->num) == 0) {
            printf("Student already exist\n");
            system("pause");
            free(p1);
            return;
        }
    }

    p1->next = NULL;
    p->next = p1;

    printf("\nDone\n");
    system("pause");
}

void del(student* head)
{
    stu *p, *p1;
    p = head;
    p1 = p->next;
    char arr[20];
    printf("input name:\n");
    scanf("%s", arr);
    while (p1 != NULL) {
        while (strcmp(arr, p1->name) == 0) {
            p->next = p1->next;
            free(p1);
            printf("Done\n");
            return;
        }
    }
    if (p1 == 0 || strcmp(arr, p1->name) != 0) {
        printf("Can not find\n");
    }
}

void look(stu* head)
{
    stu* p;
    p = head;
    p = head->next;
    if (p != NULL) {
        while (p != NULL) {
            printf("");
            printf("Name：%s\t\t", p->name);
            printf("Age：%s\t\t", p->age);
            printf("Sex：%s\t\t", p->sex);
            printf("Id：%s\t\t", p->num);
            printf("Score：%d\t\t", p->score);
            printf("Address：%s\t\t\n", p->add);
            p = p->next;
            //printf("That's All\n");
        }
    } else {
        printf("No info\n");
    }
}

void search(student* head)
{
    stu* p = head;
    char i[20];
    printf("Input Name:\n");
    scanf("%s", i);
    while (p->next != NULL) {
        while (strcmp(p->next->name, i) == 0) {
            printf("Info:\n");
            printf("Name:%s\n", p->next->name);
            printf("Age:%s\n", p->next->age);
            printf("Sex:%s\n", p->next->sex);
            printf("Id:%s\n", p->next->num);
            printf("Score:%d\n", p->next->score);
            printf("Address:%s\n\n", p->next->add);
            printf("\n");
            return;
        }
        p = p->next;
        if (p->next == NULL) {
            printf("Can not find\n");
        }
    }
}

void save(student* head)
{
    FILE* fp;
    fp = fopen("D:\\student.txt", "a+");
    stu* p = head;
    p = p->next;
    if (fp != NULL) {
        while (p != NULL) {
            fprintf(fp, "Name: %s    ", p->name);
            fprintf(fp, "Age: %s    ", p->age);
            fprintf(fp, "Sex: %s    ", p->sex);
            fprintf(fp, "Id: %s    ", p->num);
            fprintf(fp, "Address: %s    ", p->add);
            fprintf(fp, "Score: %d\n", p->score);
            p = p->next;
        }
        fclose(fp);
        printf("Saved to D\n");
    }
    system("pause");
}

void change(stu* head)
{
    stu* p = head->next;
    char i[10];
    printf("input name:\n");
    scanf("%s", &i);
    while (p != NULL) {
        while (strcmp(p->name, i) == 0) {
            printf("New Name:\n");
            scanf("%s", &p->name);
            printf("New Age:\n");
            scanf("%s", &p->age);
            printf("New Sex:\n");
            scanf("%s", &p->sex);
            printf("New Id:\n");
            scanf("%s", &p->num);
            printf("New Address:\n");
            scanf("%s", &p->add);
            printf("New Score\n");
            scanf("%d", &p->score);
            return;
        }
        p = NULL;
    }
    printf("Can not find\n");
}

void paixu(student* head)
{
    struct student *p, *p1, *t;
    p = head;
    p1 = head->next;
    system("cls");
    while (p->next != NULL) {
        while (p1->next != NULL) {
            if (p->next->score < p1->next->score) {
                t = p->next;
                p->next = p1->next;
                p1->next = p1->next->next;
                p->next->next = t;
            } else {
                p1 = p1->next;
            }
        }
        p = p->next;
        p1 = p->next;
    }
    p = head->next;
    printf("Sorted:\n");
    while (p) {
        printf("Name: %s    ", p->name);
        printf("Age: %s    ", p->age);
        printf("Sex: %s    ", p->sex);
        printf("Id: %s    ", p->num);
        printf("Address: %s    ", p->add);
        printf("Score: %d\n", p->score);
        p = p->next;
    }
}

void duqu(stu* head)
{
    FILE* fp;
    char ch;
    fp = fopen("D:\\student.txt", "r");
    if (fp == NULL) {
        printf("blank!\n");
    } else {
        ch = fgetc(fp);
        while (!feof(fp)) {
            printf("%c", ch);
            ch = fgetc(fp);
        }

        printf("\n");
    }
    system("pause");
    fclose(fp);
}

void ps(char* pStr, int Len)
{
    int lSpaceNum = (Len - strlen(pStr)) / 2;

    printf("%*s\n", lSpaceNum + strlen(pStr), pStr);
}

int main()
{
    

    
    
    struct student stu[100];
    student* head = (student*)malloc(sizeof(student));
    head->next = NULL;
    while (1) {
        
        system("cls");
        welcome();
        printf("Your choice:\n");
        int a;
        scanf("%d", &a);
        switch (a) {
        case 1:
            creat(head);
            break;
        case 2:
            del(head);
            system("pause");
            break;
        case 3:
            change(head);
            system("pause");
            break;
        case 4:
            look(head);
            system("pause");
            break;
        case 5:
            search(head);
            system("pause");
            break;
        case 6:
            save(head);
            break;
        case 7:
            paixu(head);
            system("pause");
            break;
        case 8:
            duqu(head);
            break;
        case 9:
            tuichu();
            break;
        }
    }
    return 0;
}