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bug fix.
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@PyesGO
PyesGO committed Dec 26, 2024
1 parent cfe15de commit 39ae3cf
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204 changes: 121 additions & 83 deletions main.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2,49 +2,28 @@

#include <stdio.h>

#define NAME_MAX_LEN 40
#define DATA_TITLE "学号\t名字\t成绩\n"
#define NAME_MAX_LEN 80

#define INFO_TITLE "学号\t姓名\t选修课\t实验课\t必修课\t总分"
#define INFO_FORMAT "%u\t%s\t%.1f\t%.1f\t%.1f\t%.1f"
#define INFO_DATA_FILE "data.bin"

#define print_with_format(format, ...) \
printf("\t\t" format, ##__VA_ARGS__)

#define print(str) \
print_with_format("%s\n", str)

/* 定义一个全局学生列表，用来存储所有学生的信息 */
static StudentList student_list;
#define print_without_endline(str) \
print_with_format("%s", str)

#define print_student_info_title() \
print(INFO_TITLE)

/* 清理标准输入（stdin）的多余字符 */
void clear_stdin(void)
{
/* 获取字符直到为换行符时（回车）停止 */
while (getchar() != '\n')
continue;
}

/* 自定义输出格式
* 参数:
* - string 要打印的字符串
* - end 末尾要追加的字符（一般为换行符），
* 省得每次printf后面加'\n'了，哈哈
*/
void priv_print(char *string, char end)
{
printf("\t\t%s%c", string, end);
}

/* 自定义输出，默认追加换行符
* 相当于 printf("...其他字符\n")
*/
void print(char *str)
{
priv_print(str, '\n');
}
/* 定义一个全局学生列表，用来存储所有学生的信息 */
static StudentList student_list;

/* 自定义输出（不追加换行符）*/
void print_nonew_line(char *str)
{
priv_print(str, '\0');
}

/* 展示菜单 */
void show_menu(void)
Expand All @@ -60,7 +39,7 @@ void show_menu(void)
print("| 8.显示所有学生信息 |");
print("| 0.退出系统 |");
print("|-----------------------------------------|");
print_nonew_line("请选择<0-8> -> ");
print_without_endline("请选择<0-8> -> ");
}

/* 显示所传入的学生信息
Expand Down Expand Up @@ -108,17 +87,9 @@ void show_student(StudentObject object)
if (attr.info.name == NULL)
return;

/* 这行应该不用解释，输出信息 */
print_with_format("%d\t%s\t%.1f\n", attr.info.num, attr.info.name, attr.scores.total);
}

/* 展示标题
* 即“学号 姓名 成绩”
*/
void show_title(void)
{
/* 调用了无追加换行符的print */
print_nonew_line(DATA_TITLE);
print_with_format(INFO_FORMAT "\n", attr.info.num, attr.info.name,
attr.scores.optional, attr.scores.experimental,
attr.scores.required, attr.scores.total);
}

/* 把记录中的所有学生信息显示到屏幕上 */
Expand Down Expand Up @@ -183,8 +154,8 @@ void show_all_student(void)
/* 此时返回“object”为学生列表中的第一个“学生对象” */
object = student_list_generate(&list_generator);

/* 先显示一下标题 */
show_title();

print_student_info_title();

/* 循环迭代学生列表里的元素（直到最后一个停止） */
while (object != NULL) {
Expand All @@ -198,13 +169,32 @@ void show_all_student(void)
}
}

/* 清理标准输入（stdin）的多余字符 */
void clear_stdin(void)
{
/* 获取字符直到为换行符时（回车）停止 */
while (getchar() != '\n')
continue;
}

unsigned char getchar_lower_case(void)
{
unsigned char got_char;

got_char = getchar();
if ((got_char > 64) && (got_char < 91))
got_char += 0x20;

return got_char;
}

/* 从标准输入（一般是控制台）中读取字符
* 参数：
* - attr 学生的属性，是一个指针（要修改内容就要用到指针）
* - name_max_length 名字最大长度（主要是限制从控制台获取的名字长度）
*/
void get_student_from_stdin(StudentAttribute *attr,
student_base_t name_max_length)
void get_student_info_from_stdin(StudentAttribute *attr,
student_base_t name_max_length)
{
/* 字符串的偏移量，
* 通俗讲就是字符串中第几个字符的意思
Expand All @@ -217,7 +207,7 @@ void get_student_from_stdin(StudentAttribute *attr,
unsigned char got_char;

/* 无追加换行符打印 */
print_nonew_line("请输入学生姓名: ");
print_without_endline("请输入学生姓名: ");

/* 先将字符串偏移置零，
* 使其指向字符串的第一个字符
Expand All @@ -244,7 +234,7 @@ void get_student_from_stdin(StudentAttribute *attr,
*/
offset = 0;
print_with_format("超出名字最大长度%d个字符！", name_max_length - 1);
print_nonew_line("请重新输入：");
print_without_endline("请重新输入：");
/* 清除多余的字符 */
clear_stdin();
}
Expand All @@ -258,45 +248,78 @@ void get_student_from_stdin(StudentAttribute *attr,
*/
*((attr->info.name) + offset) = '\0';

print_nonew_line("请输入学号: ");
print_without_endline("请输入学号: ");
scanf("%d", &(attr->info.num));

print_nonew_line("请输入该学生的成绩: ");
scanf("%f", &(attr->scores.total));
print_without_endline("请输入选修课成绩：");
scanf("%f", &(attr->scores.optional));

print_without_endline("请输入必修课成绩：");
scanf("%f", &(attr->scores.required));

print_without_endline("请输入实验课成绩：");
scanf("%f", &(attr->scores.experimental));

student_object_scores_sum(attr);
}

void insert_student(void)
{
StudentAttribute attr;
StudentObject object;
unsigned char name[NAME_MAX_LEN];

attr.info.name = name;
get_student_from_stdin(&attr, NAME_MAX_LEN);
student_list_append(student_list, &attr);

show_title();
show_student(student_list_get_last(student_list));
clear_stdin();
get_student_info_from_stdin(&attr, NAME_MAX_LEN);
object = student_list_append(student_list, &attr);
if (object == NULL) {
print("申请内存失败，未能成功添加该学生信息");
return;
}

print_student_info_title();
show_student(object);
}

void remove_student(void)
{
StudentAttribute attr;
StudentObject object;

print_nonew_line("请输入要删除的学号：");
scanf("%d", &(attr.info.num));
clear_stdin();
print_without_endline("请输入要删除的学号：");
scanf("%u", &(attr.info.num));

object = student_list_get_with_num(student_list, attr.info.num);
if (object == NULL) {
print("未找到该学号的学生");
return;
}

print("找到如下学生：");
print_student_info_title();
show_student(object);

if (student_list_remove_with_num(&student_list, attr.info.num) == STUDENT_OK)
print("成功删除！");
else
print("学生不存在");
clear_stdin();
print_without_endline("确认删除吗？[Y/N] ");
if (getchar_lower_case() == 'y') {
student_list_remove(&student_list, object);
print("已执行删除！");
print("请在返回主菜单后选择序号“1”进行录入以保存设置");
} else {
print("用户取消，未执行删除");
}
}

void find_student(void)
{
StudentAttribute attr;
StudentObject object;

print_nonew_line("请输入要查找的学号：");
clear_stdin();
print_without_endline("请输入要查找的学号：");
scanf("%d", &(attr.info.num));

object = student_list_get_with_num(student_list, attr.info.num);
Expand All @@ -305,7 +328,7 @@ void find_student(void)
return;
}

show_title();
print_student_info_title();
show_student(object);
}

Expand All @@ -326,52 +349,62 @@ void modify_student(void)
StudentObject object;
unsigned char name[NAME_MAX_LEN];

print_nonew_line("请输入要修改学生的学号：");
scanf("%d", &(attr.info.num));
clear_stdin();
print_without_endline("请输入要修改学生的学号：");
scanf("%u", &(attr.info.num));

object = student_list_get_with_num(student_list, attr.info.num);
if (object == NULL) {
print("指定的学生不存在！");
return;
}

print("找到如下学生：");
print_student_info_title();
show_student(object);

attr.info.name = name;
get_student_from_stdin(&attr, NAME_MAX_LEN);

clear_stdin();
get_student_info_from_stdin(&attr, NAME_MAX_LEN);
student_object_modify(object, &attr);

show_title();
print("成功修改");
print_student_info_title();
show_student(object);
}

void pause(void)
{
print_nonew_line("按下回车键继续...");
print_without_endline("按下回车键继续...");
clear_stdin();
getchar();
}

void load_from_file(void)
{
int fstat;
FILE *fp;
int fstat;
StudentAttribute attr;
unsigned char name[NAME_MAX_LEN];

fp = fopen("data.txt", "r");
fp = fopen(INFO_DATA_FILE, "rb");
if (fp == NULL) {
print("data文件不存在！");
return;
} else {
print("检测到data文件，准备导入");
}

fstat = ~EOF;
attr.info.name = name;
while (fstat != EOF) {
fstat = fscanf(fp, "%u\t%s\t%f", &(attr.info.num), attr.info.name, &(attr.scores.total));
fstat = fscanf(fp, "%s", attr.info.name);
if (fstat == EOF)
continue;

fgetc(fp);
fread(&(attr.info.num), 1, (sizeof(StudentAttribute) - sizeof(unsigned char *)), fp);
student_list_append(student_list, &attr);
}

Expand All @@ -387,11 +420,16 @@ void save_to_file(void)
StudentAttribute attr;

if (student_list_is_empty(student_list)) {
print("当前无学生信息录入");
return;
clear_stdin();
print("注意：当前为空列表，将清空文件原有的所有数据");
print_without_endline("确认继续吗？[Y/N] ");
if (getchar_lower_case() != 'y') {
print("用户取消，未修改文件");
return;
}
}

fp = fopen("data.txt", "w");
fp = fopen(INFO_DATA_FILE, "wb");
if (fp == NULL) {
print("打开文件失败！");
return;
Expand All @@ -401,7 +439,11 @@ void save_to_file(void)
object = student_list_generate(&list_generator);
while (object != NULL) {
student_object_attr_export(object, &attr);
fprintf(fp, "%u\t%s\t%f\n", attr.info.num, attr.info.name, attr.scores.total);

fprintf(fp, "%s", attr.info.name);
fputc(' ', fp);
fwrite(&(attr.info.num), 1, (sizeof(StudentAttribute) - sizeof(unsigned char *)), fp);

object = student_list_generate(&list_generator);
}

Expand Down Expand Up @@ -429,22 +471,18 @@ int main(void)
pause();
break;
case '2':
clear_stdin();
find_student();
pause();
break;
case '3':
clear_stdin();
remove_student();
pause();
break;
case '4':
clear_stdin();
modify_student();
pause();
break;
case '5':
clear_stdin();
insert_student();
pause();
break;
Expand Down
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