C小项目 —— 学生选课系统

C小项目 —— 学生选课系统

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

typedef unsigned char  uint8_t;
typedef unsigned short uint16_t;
typedef unsigned int   uint32_t;

#define CLASS_CLS    system("cls")
#define CLASS_NAME   80

typedef struct class
  {
    char name[CLASS_NAME];  /* 课程名称 -- 唯一性 */
    uint32_t nature;        /* 课程性质(必修或者选修) */
    uint32_t total_period;  /* 课程总学时 */
    uint32_t teach_period;  /* 授课学时 */
    uint32_t exper_period;  /* 上机学时 */
    uint32_t start_time;    /* 课程开始时间 */
    uint8_t score;          /* 课程学分 */
    uint8_t is_exsit;       /* 课程是否存在 */
    struct class *next;
  } class_t; // 课程结构体

class_t *head = NULL;
static uint32_t count = 1;

void play(char *text, int display, int time, int nu) //动画打印
{
  CLASS_CLS;
  int i, len;
  for(i = 0; i <= nu; i++)
  {
    printf("\n");
  }
  for(i = 0; i < 25; i++)
  {
    printf(" ");
  }
  len = strlen(text);
  for(i = 0; i < len; i++)
  {
    printf("%c", text[i]);
    Sleep(display);
  }
  Sleep(time);
}

void titile(char *text, char *str)
{
  CLASS_CLS;
  uint8_t i;
  for(i = 0; i < 25; i++)
  {
    printf(" ");
  }
  printf("%s\n", text);
  for(i = 0; i <= 60; i++)
  {
    printf("%s", str);
  }
  printf("\n");
}

void menu(void)
{
  titile("【学生选课系统】", "-");
  printf("\n\t|-----------------------------------|");
  printf("\n\t|            [1]--增加课程          |");
  printf("\n\t|            [2]--浏览课程          |");
  printf("\n\t|            [3]--查询课程          |");
  printf("\n\t|            [4]--删除课程          |");
  printf("\n\t|            [5]--修改课程          |");
  printf("\n\t|            [Q]--退出系统          |");
  printf("\n\t|-----------------------------------|");
}

void get_bat_data(void)
{
  class_t *point, *q;
  uint32_t count = 0;
  FILE *fp = fopen("c:\\student_elective.dat", "rb");
  rewind(fp);

  point = (class_t *)malloc(sizeof(class_t));
  head = point;

  while(!feof(fp))
  {
    count++;
    fread(point, sizeof(class_t), 1, fp);
    point->next = (class_t *)malloc(sizeof(class_t));
    q = point;
    point = point->next;
  }
  q->next = NULL;
  fclose(fp);
}

void save_bat_data(void)
{
  class_t *point = head;
  FILE *fp = fopen("c:\\student_elective.dat", "w+");

  while(NULL != point)
  {
    count++;
    fwrite(point, sizeof(class_t), 1, fp);
    point = point->next;
  }
  fclose(fp);
}

uint32_t num_check(void)
{
  char ch;
  uint32_t sum = 0;

  while(1)
  {
    ch = getch();
    if('\n' == ch || '\r' == ch)
    {
      return sum;
    }
    else if('\b' == ch)
    {
      sum /= 10;
      printf("\b \b");
    }
    else if(('0' <= ch) && ('9' >= ch))
    {
      sum *= 10;
      sum += ch - '0';
      printf("%d", ch - '0');
    }
  }

}

void create(void)
{
  class_t *point, *q;
  char tmp[CLASS_NAME], ch;
  uint8_t flag = 0;

  while(1)
  {
    if(1 != count)
    {
      printf("是否继续增加课程(y/n):");
      gets(tmp);
      if(strcmp(tmp, "n") == 0)
      {
        break;
      }
    }

    point = (class_t *)malloc(sizeof(class_t));
    point->is_exsit = 0;
    printf("\n====请输入第%d个选修课程信息====\n", count);
    printf("选择课程名称：");
    gets(point->name);
    q = head;
    while(NULL != q)
    {
      if(strcmp(q->name, point->name) == 0)
      {
        flag = 1;
        printf("课程名称重复或者不合格，请重新输入...\n");
        break;
      }
      q = q->next;
    }
    if(1 == flag)
    {
      continue;
    }

    printf("课程性质:");
    printf("\n[B]--【必修】 [X]--【选修】");
    while(1)
    {
      ch = getch();
      if(ch == 'b' || ch == 'B')
      {
        point->nature = 1;
        break;
      }
      if(ch == 'x' || ch == 'X')
      {
        point->nature = 2;
        break;
      }
    }

    printf("\n输入总学时：(只接受数字！)");
    point->total_period = num_check();
    printf("\n输入授课学时：(只接受数字！)");
    point->teach_period = num_check();
    printf("\n输入上机学时：(只接受数字！)");
    point->exper_period = num_check();
    printf("\n输入本课程学分：(只接受数字！)");
    point->score = num_check();
    printf("\n输入开课学期：(只接受数字！)");
    point->start_time = num_check();
    point->is_exsit = 1;

    point->next = head;
    head = point;
    count++;    
  }
  
  printf("信息录入完毕，按任意键继续……");
  getch();
}

void display(void)
{
  class_t *point = head;

  CLASS_CLS;
  titile("【查看课程】", "-");
  printf("\n名称           \t性质\t总学时\t授课学时\t上机学时\t学分\t开课学期");

  while(NULL != point)
  {
    if(1 == point->is_exsit)
    {
      printf("\n%-14s    ", point->name);
      if(1 == point->nature)
      {
        printf("必修课");
      }
      else
      {
        printf("选修课");
      }
      printf("      %d时     %d时            %d时           %d分      %d时", point->total_period, point->teach_period, point->exper_period, point->score, point->start_time);
    }
    point = point->next;
  }
  getch();
}
// 对照学生管理系统自行拓展
void search(void)
{

}

void modify(void)
{

}

void delete(void)
{

}

int main(void)
{
  uint8_t value;
  uint8_t movie = 1;
  char choice[3];

  FILE *fp = fopen("c:\\student_elective.dat", "a");
  fclose(fp);

  system("color 30");
  system("mode con:cols=100 lines=35");
  system("title 【选修课系统】");

  if(1 == movie)
  {
    play("欢迎使用【选修课系统】", 80, 1500, 10);
  }

  while(1)
  {
    CLASS_CLS;
    menu();
    do
    {
      gets(choice);
      value = atoi(choice);
    }
    while((value > 12) || (value < 0));
    switch(value)
    {
    case 1:
      create();
      break;
    case 2:
      display();
      break;
    case 3:
      search();
      break;
    case 4:
      modify();
      break;
    case 5:
      delete();
      break;
    case 6:
      save_bat_data();
      break;
    case 7:
      get_bat_data();
      break;
    case 8:
      exit(1);
      break;

    default:
      break;
    }
  }

  return 0;
}