1
#include <stdio.h>
#include <string.h>
int days_s(char *st);
struct month {
char month_a[20];
char month_b[3];
int days;
int month_c;
};
struct month months[12] = {
{ "january","jan",31,1 },
{ "february","feb",28,2 },
{ "march","mar",31,3 },
{ "april","apr",30,4 },
{ "may","may",31,5 },
{ "june","jun",30,6 },
{ "july","jul",31,7 },
{ "august","aug",31,8 },
{ "september","sep",30,9 },
{ "october","oct",31,10 },
{ "november","nov",30,11 },
{ "december","dec",31,12 }
};
int main()
{
int i;
int count = 0;
char ch[20];
bk:puts("请输入月份");
scanf_s("%s", ch, 20);
for (i = 0; i < 12; i++)
{
if (!strcmp(months[i].month_a, ch))
count++;
}
if (count == 0)
{
puts("输入错误, 您输入的不是正确的月份.");
goto bk;
}
printf("january - %s 月总计 %d 天.\n", ch, days_s(ch));
system("pause");
return 0;
}
int days_s(char *st)
{
int i;
int count = 0;
for (i = 0; i < 12; i++)
{
count += months[i].days;
if (!strcmp(months[i].month_a, st))
break;
}
return count;
}
2
#include <stdio.h>
#include <string.h>
void days_s(void);
struct month {
char month_a[20];
char month_b[3];
int days;
int month_c;
};
struct month months[12] = {
{ "january","jan",31,1 },
{ "february","feb",28,2 },
{ "march","mar",31,3 },
{ "april","apr",30,4 },
{ "may","may",31,5 },
{ "june","jun",30,6 },
{ "july","jul",31,7 },
{ "august","aug",31,8 },
{ "september","sep",30,9 },
{ "october","oct",31,10 },
{ "november","nov",30,11 },
{ "december","dec",31,12 }
};
int main()
{
days_s();
system("pause");
return 0;
}
void days_s(void)
{
int i;
int tot = 0;
int count = 0;
char ch[20];
int day;
int month_s;
int year;
bk1:puts("请输入日: ");
while (scanf_s("%d", &day) != 1)
{
puts("输入错误, 请输入1-31:");
}
if (day < 1 || day>31)
{
puts("错误: 请输入1-31:");
goto bk1;
}
bk2:puts("请输入月份:");
scanf_s("%s", ch, 20);
for (i = 0; i < 12; i++)
{
if (!strcmp(months[i].month_a, ch))
tot = 1;
else if (!strcmp(months[i].month_b, ch))
tot = 2;
else if (ch[0] >= '0'&&ch[0] <= '9')
{
sscanf_s(ch, "%d", &month_s);
tot = 3;
}
}
if (tot == 0)
{
puts("错误: 请输入1-12月, 英文月份, 或者英文月份缩写.");
goto bk2;
}
puts("请输入年份: ");
scanf_s("%d", &year);
for (i = 0; i < 12; i++)
{
if (tot == 1)
{
if (!strcmp(months[i].month_a, ch))
break;
}
else if (tot == 2)
{
if (!strcmp(months[i].month_b, ch))
break;
}
else if (tot == 3)
{
if (months[i].month_c == month_s)
break;
}
count += months[i].days;
}
count += day;
if (tot == 1)
{
printf("%d / january 月 1 日 - %d / %s 月 %d 日 总计 %d 天.\n", year, year, ch, day, count);
}
else if (tot == 2)
{
printf("%d / jan 月 1 日 - %d / %s 月 %d 日 总计 %d 天.\n", year, year, ch, day, count);
}
else if (tot == 3)
{
printf("%d / 1 月 1 日 - %d / %d 月 %d 日 总计 %d 天.\n", year, year, month_s, day, count);
}
}
3
#include <stdio.h>
#include <string.h>
#define MAXTITL 40
#define MAXAUTL 40
#define MAXBKS 100
//输入
char *s_gets(char *st, int n);
//以标题首字母升序排序
void title_s(struct book *pst[], int n);
//以价格升序排序
void money(struct book *pst[], int n);
struct book {
char title[MAXTITL];
char author[MAXAUTL];
float value;
};
int main()
{
struct book library[MAXBKS];
struct book *pst1[MAXBKS];
struct book *pst2[MAXBKS];
int count = 0;
int index;
printf("请输入书名: \n");
printf("按一行开始处按[enter]停止.\n");
while (count < MAXBKS&&s_gets(library[count].title, MAXTITL) != NULL && library[count].title[0] != '\0')
{
printf("现在输入作者: \n");
s_gets(library[count].author, MAXAUTL);
puts("现在输入价格: ");
scanf_s("%f", &library[count].value);
pst1[count] = &library[count];
pst2[count] = &library[count];
count++;
while (getchar() != '\n')
continue;
if (count < MAXBKS)
puts("输入下一个标题: ");
}
if (count > 0)
{
puts("书籍列表[输入升序]:");
for (index = 0; index < count; index++)
printf("%s by %s: $%.2f\n", library[index].title, library[index].author, library[index].value);
title_s(pst1, count);
money(pst2, count);
}
else
puts("没有书? 太糟糕了.");
system("pause");
return 0;
}
void money(struct book *pst[], int n)
{
int i, j;
struct book *temp;
for (i = 0; i < n; i++)
{
for (j = i; j < n; j++)
{
if (pst[i]->value > pst[j]->value)
{
temp = pst[i];
pst[i] = pst[j];
pst[j] = temp;
}
}
}
puts("书籍列表[价格升序]:");
for (i = 0; i < n; i++)
printf("%s by %s: $%.2f\n", pst[i]->title, pst[i]->author, pst[i]->value);
}
void title_s(struct book *pst[], int n)
{
int i, j;
struct book *temp;
for (i = 0; i < n; i++)
{
for (j = i; j < n; j++)
{
if (pst[i]->title[0] > pst[j]->title[0])
{
temp = pst[i];
pst[i] = pst[j];
pst[j] = temp;
}
}
}
puts("书籍列表[首字母升序]:");
for (i = 0; i < n; i++)
printf("%s by %s: $%.2f\n", pst[i]->title, pst[i]->author, pst[i]->value);
}
char *s_gets(char *st, int n)
{
char *ret_val;
ret_val = fgets(st, n, stdin);
if (ret_val)
{
while (*st != '\n'&&*st != '\0')
st++;
if (*st == '\n')
*st = '\0';
else
while (getchar() != '\n')
continue;
}
return ret_val;
}
4
a
#include <stdio.h>
#include <string.h>
struct namect
{
char name_a[20];
char name_b[20];
char name_c[10];
};
typedef struct s_name
{
int num;
struct namect name;
} name;
void show(name *pst[], int n);
//输入
char *s_gets(char *st, int n);
int main()
{
name list[5];
name *ps1[5];
int i = 0;
puts("请输入名: ");
while (s_gets(list[i].name.name_a, 20) != NULL && list[i].name.name_a[0] != '\0')
{
puts("请输入中间名[按Enter跳过]: ");
s_gets(list[i].name.name_b, 20);
puts("请输入姓: ");
scanf_s("%s", list[i].name.name_c, 10);
puts("请输入社会保险号:");
scanf_s("%d", &list[i].num);
ps1[i] = &list[i];
i++;
while (getchar() != '\n')
continue;
if (i == 5)
break;
puts("请输入名[按Enter退出]: ");
}
if (i > 0)
show(ps1, i);
else
puts("没有输入内容, 结束.");
system("pause");
return 0;
}
void show(name *pst[], int n)
{
int i;
for (i = 0; i < n; i++)
{
if (pst[i]->name.name_b[0] == '\0')
printf("%s, %s -- %d\n", pst[i]->name.name_a, pst[i]->name.name_c, pst[i]->num);
else
printf("%s, %s %c. -- %d\n", pst[i]->name.name_a, pst[i]->name.name_b, pst[i]->name.name_c[0], pst[i]->num);
}
}
char *s_gets(char *st, int n)
{
char *ret_val, *find;
ret_val = fgets(st, n, stdin);
if (ret_val)
{
find = strchr(st, '\n');
if (find)
*find = '\0';
else
while (getchar() != '\n')
continue;
}
return ret_val;
}
b
#include <stdio.h>
#include <string.h>
struct namect
{
char name_a[20];
char name_b[20];
char name_c[10];
};
typedef struct s_name
{
int num;
struct namect name;
} name;
//打印内容
void show(char *st1, char *st2, char *st3, int n);
//输入
char *s_gets(char *st, int n);
int main()
{
name list[5];
int i = 0;
int j;
puts("请输入名: ");
while (s_gets(list[i].name.name_a, 20) != NULL && list[i].name.name_a[0] != '\0')
{
puts("请输入中间名[按Enter跳过]: ");
s_gets(list[i].name.name_b, 20);
puts("请输入姓: ");
scanf_s("%s", list[i].name.name_c, 10);
puts("请输入社会保险号:");
scanf_s("%d", &list[i].num);
i++;
while (getchar() != '\n')
continue;
if (i == 5)
break;
puts("请输入名[按Enter退出]: ");
}
if (i > 0)
for (j = 0; j < i; j++)
show(list[j].name.name_a, list[j].name.name_b, list[j].name.name_c, list[j].num);
else
puts("没有输入内容, 结束.");
system("pause");
return 0;
}
void show(char *st1, char *st2, char *st3, int n)
{
if (st2[0] == '\0')
printf("%s, %s -- %d\n", st1, st3, n);
else
printf("%s, %s %c. -- %d\n", st1, st2, st3[0], n);
}
char *s_gets(char *st, int n)
{
char *ret_val, *find;
ret_val = fgets(st, n, stdin);
if (ret_val)
{
find = strchr(st, '\n');
if (find)
*find = '\0';
else
while (getchar() != '\n')
continue;
}
return ret_val;
}
5
#include <stdio.h>
#define CSIZE 4
struct name
{
char name_a[20];
char name_b[10];
};
struct student
{
struct name namect;
float grade[3];
float average;
};
//输入
char *s_gets(char *st, int n);
//计算个人平均分
void Average(struct student pst[], int n);
//计算班级平均分
void Avergae_s(struct student pst[], int n);
int main()
{
struct student list[CSIZE];
int i = 0;
int j;
puts("请输入姓: ");
while (s_gets(list[i].namect.name_b, 10) != NULL && list[i].namect.name_b[0] != '\0')
{
puts("请输入名: ");
scanf_s("%s", list[i].namect.name_a, 20);
puts("请输入三组分数: ");
scanf_s("%f%f%f", &list[i].grade[0], &list[i].grade[1], &list[i].grade[2]);
i++;
while (getchar() != '\n')
continue;
if (i == CSIZE)
break;
puts("请输入姓[空行退出]: ");
}
if (i > 0)
{
Average(list, i);
for (j = 0; j < i; j++)
{
printf("姓名: %s, %s \t分数: %g %g %g \t平均分: %g\n", list[j].namect.name_a, list[j].namect.name_b, list[j].grade[0],
list[j].grade[1], list[j].grade[2], list[j].average);
}
Avergae_s(list, i);
}
else
puts("错误: 您没有输入内容.");
system("pause");
return 0;
}
void Avergae_s(struct student pst[], int n)
{
float tot = 0;
int i;
for (i = 0; i < n; i++)
{
tot += (pst[i].grade[0] + pst[i].grade[1] + pst[i].grade[2]) / 3;
}
printf("班级平均分: %g\n", tot / n);
}
void Average(struct student pst[], int n)
{
int i;
for (i = 0; i < n; i++)
{
pst[i].average = (pst[i].grade[0] + pst[i].grade[1] + pst[i].grade[2]) / 3;
}
}
char *s_gets(char *st, int n)
{
char *ret_val;
ret_val = fgets(st, n, stdin);
if (ret_val)
{
while (*st != '\n'&&*st != '\0')
st++;
if (*st == '\n')
*st = '\0';
else
while (getchar() != '\n')
continue;
}
return ret_val;
}
6
#include <stdio.h>
#include <stdlib.h>
struct data
{
int number; //球员号
char name_b[20]; //名
char name_a[10]; //姓
int num_a; //球员上场次数
int num_b; //击中数
int num_c; //走垒数
int num_d; //打点RBI
float total; //安打率
};
int main()
{
errno_t err;
FILE *fp;
char name[81];
struct data list[19] = {
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
{ 0,'\0','\0',0,0,0,0,0 },
};
int i;
struct data temp;
puts("请输入需要打开的文件名: ");
scanf_s("%s", name, 81);
if ((err = fopen_s(&fp, name, "r")) != 0)
{
fprintf(stderr, "错误: 无法打开 %s 文件\n", name);
exit(EXIT_FAILURE);
}
while (!feof(fp))
{
fscanf_s(fp, "%d", &temp.number);
fscanf_s(fp, "%s", temp.name_b, 20);
fscanf_s(fp, "%s", temp.name_a, 10);
fscanf_s(fp, "%d", &temp.num_a);
fscanf_s(fp, "%d", &temp.num_b);
fscanf_s(fp, "%d", &temp.num_c);
fscanf_s(fp, "%d", &temp.num_d);
if (list[temp.number].name_b[0] == '\0')
list[temp.number] = temp;
else
{
list[temp.number].num_a += temp.num_a;
list[temp.number].num_b += temp.num_b;
list[temp.number].num_c += temp.num_c;
list[temp.number].num_d += temp.num_d;
}
}
puts("球员号 名 姓 上场次数 击中数 走垒数 打点[RBI] 安打率 ");
for (i = 0; i < 19; i++)
{
if (list[i].num_b != 0)
list[i].total = (float)list[i].num_b / (float)list[i].num_a;
else
list[i].total = 0;
printf("%-6d %-9s %-9s %-8d %-6d %-6d %-9d %g\n", list[i].number, list[i].name_b, list[i].name_a, list[i].num_a,
list[i].num_b, list[i].num_c, list[i].num_d, list[i].total);
}
fclose(fp);
system("pause");
return 0;
}
7
//在文件中保存结构中的内容
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#define MAXTITL 40
#define MAXAUTL 40
#define MAXBKS 10
struct book {
int Title;
char title[MAXTITL];
char author[MAXAUTL];
float value;
bool delete;
};
//输入
char *s_gets(char *st, int n);
//显示菜单
int menu(void);
//删除图书
int s_delete(struct book pst[], int n);
int main()
{
struct book library[MAXBKS]; //结构数组
int count = 0;
int filecount;
errno_t err;
FILE *pbooks;
int size = sizeof(struct book); //结构大小
int num; //菜单选项
int i, j = 0;
while ((err = fopen_s(&pbooks, "book.dat", "r+b")) != 0) //因为r+b模式无法创建文件
{
if ((err = fopen_s(&pbooks, "book.dat", "wb")) != 0) //所以当无法打开文件的时候以wb模式创建一个新文件然后以r+b模式打开
{
fputs("无法打开 book.dat 文件\n", stderr);
exit(0);
}
fclose(pbooks);
}
while ((num = menu()) != 4)
{
rewind(pbooks);
while (getchar() != '\n')
continue;
if (num == 1)
{
count = 0;
while (count < MAXBKS&&fread(&library[count], size, 1, pbooks) == 1)
{
if (count == 0)
puts("book.dat 当前内容: ");
printf("%d. %s by %s: $%.2f\n", library[count].Title, library[count].title, library[count].author, library[count].value);
count++;
}
if (count == 0)
{
fputs("错误: 当前系统没有内容\n", stderr);
continue;
}
}
else if (num == 2)
{
count = 0;
while (count < MAXBKS&&fread(&library[count], size, 1, pbooks) == 1)
{
if (count == 0)
puts("book.dat 当前内容: ");
printf("%d. %s by %s: $%.2f\n", library[count].Title, library[count].title, library[count].author, library[count].value);
count++;
}
if (count == MAXBKS)
{
fputs("错误: 当前系统已满请管理图书删除内容后重新添加\n", stderr);
continue;
}
filecount = count;
puts("请添加新书标题.");
puts("在一行开始按[Enter]退出.");
while (count < MAXBKS&&s_gets(library[count].title, MAXTITL) != NULL && library[count].title[0] != '\0')
{
puts("现在输入作者:");
s_gets(library[count].author, MAXAUTL);
puts("现在输入值:");
scanf_s("%f", &library[count].value);
library[count].delete = true;
library[count].Title = count + 1;
while (getchar() != '\n')
continue;
count++;
if (count < MAXBKS)
puts("输入下一个标题:");
}
if (count==filecount)
{
fputs("错误: 您没有输入内容, 返回\n", stderr);
continue;
}
fwrite(&library[filecount], size, count - filecount, pbooks);
}
else if (num == 3)
{
count = 0;
while (count < MAXBKS&&fread(&library[count], size, 1, pbooks) == 1)
{
if (count == 0)
puts("book.dat 当前内容: ");
printf("%d. %s by %s: $%.2f\n", library[count].Title, library[count].title, library[count].author, library[count].value);
count++;
}
if (count == 0)
{
fputs("错误: 当前系统没有内容\n", stderr);
continue;
}
if (s_delete(library, count) == 0)
{
fputs("错误: 您没有任何操作, 返回\n", stderr);
continue;
}
puts("提示: 开始删除写入...");
fclose(pbooks);
if ((err = fopen_s(&pbooks, "book.dat", "w+b")) != 0)
{
fputs("无法打开 book.dat 文件\n", stderr);
exit(0);
}
for (i = 0; i < count; i++)
{
if (library[i].delete)
{
library[i].Title = j + 1;
fwrite(&library[i], size, 1, pbooks);
j++;
}
}
puts("提示: 操作完成");
}
}
puts("再见");
fclose(pbooks);
system("pause");
return 0;
}
int s_delete(struct book pst[], int n)
{
int i = 0;
int delete_a;
char del_a[] = "删除";
char del_b[] = "储存";
puts("请输入你要删除的图书, 重复选择可以切换删除与保留模式:");
while (scanf_s("%d", &delete_a) == 1 && (delete_a > 0 && delete_a <= n))
{
if (pst[delete_a - 1].delete)
pst[delete_a - 1].delete = false;
else
pst[delete_a - 1].delete = true;
for (i = 0; i < n; i++)
{
if (pst[i].delete)
printf("%d. %s by %s: $%.2f %s\n", pst[i].Title, pst[i].title, pst[i].author, pst[i].value, del_b);
else
printf("%d. %s by %s: $%.2f %s\n", pst[i].Title, pst[i].title, pst[i].author, pst[i].value, del_a);
}
puts("请继续输入你要删除的图书, 重复选择可以切换删除与保留模式[q退出]:");
}
while (getchar() != '\n')
continue;
return i;
}
int menu(void)
{
int num;
puts("*********图书管理系统*********");
puts("1. 显示图书 \t2. 添加图书");
puts("3. 删除图书 \t4. 退出系统");
puts("******************************");
bk:while (scanf_s("%d", &num) != 1)
{
fputs("错误: 请输入1-4\n", stderr);
while (getchar() != '\n')
continue;
}
if (num < 1 || num>4)
{
fputs("错误: 请输入1-4\n", stderr);
while (getchar() != '\n')
continue;
goto bk;
}
return num;
}
char *s_gets(char *st, int n)
{
char *ret_val, *find;
ret_val = fgets(st, n, stdin);
if (ret_val)
{
find = strchr(st, '\n');
if (find)
*find = '\0';
else
while (getchar() != '\n')
continue;
}
return ret_val;
}
8
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#define SIZE 12
struct seat
{
int number; //座位号
bool empty; //座位使用
char name_a[20]; //名
char name_b[10]; //姓
};
//显示菜单
char menu(void);
//抛弃多余输入字符
void d_stdin(void);
//按字母顺序打印座位列表
void show(struct seat *pst[], int n);
//给客户分配座位
int Seat_set(struct seat *pst[], int n);
//删除座位
int d_Seat(struct seat *pst[], int n);
//输入
char *s_gets(char *st, int n);
int main()
{
int i;
int filecount;
int count;
errno_t err;
FILE *fp;
char ch;
int size = sizeof(struct seat);
struct seat list[SIZE] = {
{ 1,true,'\0','\0' },
{ 2,true,'\0','\0' },
{ 3,true,'\0','\0' },
{ 4,true,'\0','\0' },
{ 5,true,'\0','\0' },
{ 6,true,'\0','\0' },
{ 7,true,'\0','\0' },
{ 8,true,'\0','\0' },
{ 9,true,'\0','\0' },
{ 10,true,'\0','\0' },
{ 11,true,'\0','\0' },
{ 12,true,'\0','\0' },
};
struct seat *pst1[SIZE];
struct seat *pst2[SIZE];
for (i = 0; i < SIZE; i++)
{
pst1[i] = &list[i];
pst2[i] = &list[i];
}
while ((err = fopen_s(&fp, "data.bat", "r+b")) != 0)
{
if ((err = fopen_s(&fp, "data.bat", "wb")) != 0)
{
fputs("错误: 无法创建数据文件 data.bat \n", stderr);
exit(0);
}
fwrite(&list[0], size, SIZE, fp);
fclose(fp);
}
while ((ch = menu()) != 'f')
{
filecount = 0;
rewind(fp);
count = 0;
switch (ch)
{
case 'a':
while (filecount < SIZE&&fread(&list[filecount], size, 1, fp) == 1)
filecount++;
for (i = 0, count = 0; i < SIZE; i++)
{
if (list[i].empty)
count++;
}
printf("查询结果: 目前空闲座位余数为 %d\n\n", count);
break;
case 'b':
while (filecount < SIZE&&fread(&list[filecount], size, 1, fp) == 1)
filecount++;
printf("查询结果: \n目前空闲座位列表\n");
for (i = 0; i < SIZE; i++)
{
if (list[i].empty)
printf("%-2d 空闲\n", list[i].number);
else
printf("%-2d 占有\n", list[i].number);
}
putchar('\n');
break;
case 'c':
while (filecount < SIZE&&fread(&list[filecount], size, 1, fp) == 1)
filecount++;
show(pst1, SIZE);
break;
case 'd':
while (filecount < SIZE&&fread(&list[filecount], size, 1, fp) == 1)
filecount++;
printf("提示: 目前可以预定的座位\n");
for (i = 0; i < SIZE; i++)
{
if (list[i].empty)
printf("%-2d 空闲\n", list[i].number);
}
if (Seat_set(pst2, SIZE) == 0)
{
fputs("错误: 您没有进行任何操作, 返回菜单 \n\n", stderr);
break;
}
fclose(fp);
puts("提示: 正在修改写入数据库");
if ((err = fopen_s(&fp, "data.bat", "w+b")) != 0)
{
fputs("错误: 无法打开数据文件 data.bat \n", stderr);
exit(0);
}
fwrite(&list[0], size, SIZE, fp);
puts("提示: 写入完成\n");
break;
case 'e':
while (filecount < SIZE&&fread(&list[filecount], size, 1, fp) == 1)
filecount++;
for (i = 0; i < SIZE; i++)
{
if (!list[i].empty)
{
count++;
printf("%-2d %-15s %-10s 占有\n", list[i].number, list[i].name_a, list[i].name_b);
}
}
if (count == 0)
{
fputs("错误: 当前系统座位全部为空闲状态, 返回菜单 \n\n", stderr);
break;
}
if (d_Seat(pst2, SIZE) == 0)
{
fputs("错误: 您没有进行任何操作, 返回菜单 \n\n", stderr);
break;
}
fclose(fp);
puts("提示: 正在修改写入数据库");
if ((err = fopen_s(&fp, "data.bat", "w+b")) != 0)
{
fputs("错误: 无法打开数据文件 data.bat \n", stderr);
exit(0);
}
fwrite(&list[0], size, SIZE, fp);
puts("提示: 写入完成\n");
break;
default:
break;
}
d_stdin();
}
puts("完成");
fclose(fp);
system("pause");
return 0;
}
//给客户分配座位
int Seat_set(struct seat *pst[], int n)
{
int i;
int num;
int count = 0;
int j = 0;
puts("请输入需要预定的座位: ");
while (scanf_s("%d", &num) == 1)
{
if (num < 1 || num > 12)
{
fputs("错误: 请输入 1 - 12 空闲的座位\n", stderr);
d_stdin();
continue;
}
num = num - 1;
if (!pst[num]->empty)
{
fputs("错误: 请输入 1 - 12 空闲的座位\n", stderr);
fprintf(stderr, "%d 座位已被占用.\n", pst[num]->number);
d_stdin();
continue;
}
d_stdin();
puts("请输入名: ");
while (s_gets(pst[num]->name_a, 20) && pst[num]->name_a[0] == '\0')
fputs("错误: 名不能为空.\n", stderr);
puts("请输入姓: ");
while (s_gets(pst[num]->name_b, 10) && pst[num]->name_b[0] == '\0')
fputs("错误: 姓不能为空.\n", stderr);
pst[num]->empty = false;
j++;
for (i = 0; i < SIZE; i++)
{
if (pst[i]->empty)
{
printf("%-2d 空闲\n", pst[i]->number);
count++;
}
}
if (count == 0)
{
fputs("提示: 目前已经没有可预定的座位, 返回菜单\n", stderr);
break;
}
else
{
puts("提示: 还有以上座位可以预定 \n请输入下一个座位[q退出]: ");
}
}
putchar('\n');
return j;
}
//删除座位
int d_Seat(struct seat *pst[], int n)
{
int i;
int num;
int count = 0;
int j = 0;
puts("请输入你要删除的座位: ");
while (scanf_s("%d", &num) == 1)
{
if (num < 1 || num > 12)
{
fputs("错误: 请输入 1 - 12 占有的座位\n", stderr);
d_stdin();
continue;
}
num = num - 1;
if (pst[num]->empty)
{
fputs("错误: 请输入 1 - 12 占有的座位\n", stderr);
fprintf(stderr, "%d 座位是空闲状态.\n", pst[num]->number);
d_stdin();
continue;
}
d_stdin();
pst[num]->empty = true;
*pst[num]->name_a = '\0';
*pst[num]->name_b = '\0';
j++;
for (i = 0; i < SIZE; i++)
{
if (!pst[i]->empty)
{
count++;
printf("%-2d %-15s %-10s 占有\n", pst[i]->number, pst[i]->name_a, pst[i]->name_b);
}
}
if (count == 0)
{
fputs("错误: 当前系统座位全部为空闲状态, 返回菜单 \n\n", stderr);
break;
}
else
puts("提示: 还有以上座位可以删除 \n请输入下一个座位[q退出]: ");
}
putchar('\n');
return j;
}
//按字母顺序打印座位列表
void show(struct seat *pst[], int n)
{
int i, j;
struct seat *temp;
int count = 0;
for (i = 0; i < n; i++)
{
for (j = i; j < n; j++)
{
if (pst[i]->name_a[0] > pst[j]->name_a[0])
{
temp = pst[i];
pst[i] = pst[j];
pst[j] = temp;
}
}
}
for (i = 0; i < n; i++)
{
if (!pst[i]->empty)
{
printf("%-2d %-15s %-10s\n", pst[i]->number, pst[i]->name_a, pst[i]->name_b);
count++;
}
}
if (count == 0)
puts("提示: 当前系统座位全部为空闲状态.");
putchar('\n');
}
//显示菜单
char menu(void)
{
char ch;
puts("****巨人航空座位预定管理系统****");
puts("a. 显示空闲座位余数");
puts("b. 显示空闲座位列表");
puts("c. 显示按字母排列的座位列表");
puts("d. 给客户分配座位");
puts("e. 管理删除已分配的座位");
puts("f. 退出");
puts("********************************");
bk:while (scanf_s("%c", &ch, 1) != 1)
{
fputs("错误: 请输入 a - f \n", stderr);
d_stdin();
}
if (ch < 'a' || ch > 'f')
{
fputs("错误: 请输入 a - f \n", stderr);
d_stdin();
goto bk;
}
return ch;
}
//抛弃多余字符
void d_stdin(void)
{
while (getchar() != '\n')
continue;
}
char *s_gets(char *st, int n)
{
char *ret_val, *find;
ret_val = fgets(st, n, stdin);
if (ret_val)
{
find = strchr(st, '\n');
if (find)
*find = '\0';
else
while (getchar() != '\n')
continue;
}
return ret_val;
}
9
确认座位分配不知道是干嘛的没有写
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#define SIZE 12
struct seat
{
int number; //座位号
bool empty; //座位使用
char name_a[20]; //名
char name_b[10]; //姓
};
//显示顶层菜单
int top_menu(void);
//显示菜单
char menu(char st[][20], int n);
//抛弃多余输入字符
void d_stdin(void);
//按字母顺序打印座位列表
void show(struct seat *pst[], int n);
//给客户分配座位
int Seat_set(struct seat *pst[], int n);
//删除座位
int d_Seat(struct seat *pst[], int n);
//输入
char *s_gets(char *st, int n);
int main()
{
int i;
int filecount;
int count;
int n_num;
errno_t err;
FILE *fp;
char ch;
char name[4][15] =
{
"data1.dat",
"data2.dat",
"data3.dat",
"data4.dat",
};
int size = sizeof(struct seat);
struct seat list[SIZE] = {
{ 1,true,'\0','\0' },
{ 2,true,'\0','\0' },
{ 3,true,'\0','\0' },
{ 4,true,'\0','\0' },
{ 5,true,'\0','\0' },
{ 6,true,'\0','\0' },
{ 7,true,'\0','\0' },
{ 8,true,'\0','\0' },
{ 9,true,'\0','\0' },
{ 10,true,'\0','\0' },
{ 11,true,'\0','\0' },
{ 12,true,'\0','\0' },
};
struct seat *pst1[SIZE];
struct seat *pst2[SIZE];
char plane[4][20] = { "航班102","航班311","航班444","航班519" };
for (i = 0; i < SIZE; i++)
{
pst1[i] = &list[i];
pst2[i] = &list[i];
}
while ((n_num = top_menu()) != 5)
{
d_stdin();
while ((err = fopen_s(&fp, name[n_num - 1], "r+b")) != 0)
{
if ((err = fopen_s(&fp, name[n_num - 1], "wb")) != 0)
{
fprintf(stderr, "错误: 无法打开数据文件 %s \n", name[n_num - 1]);
exit(0);
}
for (i = 0; i < SIZE; i++)
{
list[i].empty = true;
*list[i].name_a = '\0';
*list[i].name_b = '\0';
}
fwrite(&list[0], size, SIZE, fp);
fclose(fp);
}
while ((ch = menu(plane, n_num - 1)) != 'f')
{
filecount = 0;
rewind(fp);
count = 0;
while (filecount < SIZE&&fread(&list[filecount], size, 1, fp) == 1)
filecount++;
switch (ch)
{
case 'a':
for (i = 0, count = 0; i < SIZE; i++)
{
if (list[i].empty)
count++;
}
printf("查询结果: 目前空闲座位余数为 %d\n\n", count);
break;
case 'b':
printf("查询结果: \n目前空闲座位列表\n");
for (i = 0; i < SIZE; i++)
{
if (list[i].empty)
printf("%-2d 空闲\n", list[i].number);
else
printf("%-2d 占有\n", list[i].number);
}
putchar('\n');
break;
case 'c':
show(pst1, SIZE);
break;
case 'd':
printf("提示: 目前可以预定的座位\n");
for (i = 0; i < SIZE; i++)
{
if (list[i].empty)
printf("%-2d 空闲\n", list[i].number);
}
if (Seat_set(pst2, SIZE) == 0)
{
fputs("错误: 您没有进行任何操作, 返回菜单 \n\n", stderr);
break;
}
fclose(fp);
puts("提示: 正在修改写入数据库");
if ((err = fopen_s(&fp, name[n_num - 1], "w+b")) != 0)
{
fprintf(stderr, "错误: 无法打开数据文件 %s \n", name[n_num - 1]);
exit(0);
}
fwrite(&list[0], size, SIZE, fp);
puts("提示: 写入完成\n");
break;
case 'e':
for (i = 0; i < SIZE; i++)
{
if (!list[i].empty)
{
count++;
printf("%-2d %-15s %-10s 占有\n", list[i].number, list[i].name_a, list[i].name_b);
}
}
if (count == 0)
{
fputs("错误: 当前系统座位全部为空闲状态, 返回菜单 \n\n", stderr);
break;
}
if (d_Seat(pst2, SIZE) == 0)
{
fputs("错误: 您没有进行任何操作, 返回菜单 \n\n", stderr);
break;
}
fclose(fp);
puts("提示: 正在修改写入数据库");
if ((err = fopen_s(&fp, name[n_num - 1], "w+b")) != 0)
{
fprintf(stderr, "错误: 无法打开数据文件 %s \n", name[n_num - 1]);
exit(0);
}
fwrite(&list[0], size, SIZE, fp);
puts("提示: 写入完成\n");
break;
default:
break;
}
d_stdin();
}
fclose(fp);
}
puts("完成");
fclose(fp);
system("pause");
return 0;
}
//给客户分配座位
int Seat_set(struct seat *pst[], int n)
{
int i;
int num;
int count = 0;
int j = 0;
puts("请输入需要预定的座位: ");
while (scanf_s("%d", &num) == 1)
{
if (num < 1 || num > 12)
{
fputs("错误: 请输入 1 - 12 空闲的座位\n", stderr);
d_stdin();
continue;
}
num = num - 1;
if (!pst[num]->empty)
{
fputs("错误: 请输入 1 - 12 空闲的座位\n", stderr);
fprintf(stderr, "%d 座位已被占用.\n", pst[num]->number);
d_stdin();
continue;
}
d_stdin();
puts("请输入名: ");
while (s_gets(pst[num]->name_a, 20) && pst[num]->name_a[0] == '\0')
fputs("错误: 名不能为空.\n", stderr);
puts("请输入姓: ");
while (s_gets(pst[num]->name_b, 10) && pst[num]->name_b[0] == '\0')
fputs("错误: 姓不能为空.\n", stderr);
pst[num]->empty = false;
j++;
for (i = 0; i < SIZE; i++)
{
if (pst[i]->empty)
{
printf("%-2d 空闲\n", pst[i]->number);
count++;
}
}
if (count == 0)
{
fputs("提示: 目前已经没有可预定的座位, 返回菜单\n", stderr);
break;
}
else
{
puts("提示: 还有以上座位可以预定 \n请输入下一个座位[q退出]: ");
}
}
putchar('\n');
return j;
}
//删除座位
int d_Seat(struct seat *pst[], int n)
{
int i;
int num;
int count = 0;
int j = 0;
puts("请输入你要删除的座位: ");
while (scanf_s("%d", &num) == 1)
{
if (num < 1 || num > 12)
{
fputs("错误: 请输入 1 - 12 占有的座位\n", stderr);
d_stdin();
continue;
}
num = num - 1;
if (pst[num]->empty)
{
fputs("错误: 请输入 1 - 12 占有的座位\n", stderr);
fprintf(stderr, "%d 座位是空闲状态.\n", pst[num]->number);
d_stdin();
continue;
}
d_stdin();
pst[num]->empty = true;
*pst[num]->name_a = '\0';
*pst[num]->name_b = '\0';
j++;
for (i = 0; i < SIZE; i++)
{
if (!pst[i]->empty)
{
count++;
printf("%-2d %-15s %-10s 占有\n", pst[i]->number, pst[i]->name_a, pst[i]->name_b);
}
}
if (count == 0)
{
fputs("错误: 当前系统座位全部为空闲状态, 返回菜单 \n\n", stderr);
break;
}
else
puts("提示: 还有以上座位可以删除 \n请输入下一个座位[q退出]: ");
}
putchar('\n');
return j;
}
//按字母顺序打印座位列表
void show(struct seat *pst[], int n)
{
int i, j;
struct seat *temp;
int count = 0;
for (i = 0; i < n; i++)
{
for (j = i; j < n; j++)
{
if (pst[i]->name_a[0] > pst[j]->name_a[0])
{
temp = pst[i];
pst[i] = pst[j];
pst[j] = temp;
}
}
}
for (i = 0; i < n; i++)
{
if (!pst[i]->empty)
{
printf("%-2d %-15s %-10s\n", pst[i]->number, pst[i]->name_a, pst[i]->name_b);
count++;
}
}
if (count == 0)
puts("提示: 当前系统座位全部为空闲状态.");
putchar('\n');
}
//显示顶层菜单
int top_menu(void)
{
int num;
puts("****巨人航空座位预定管理系统****");
puts("1. 航班102 \t2. 航班311");
puts("3. 航班444 \t4. 航班519");
puts("5. 退出");
puts("********************************");
bk:while (scanf_s("%d", &num) != 1)
{
fputs("错误: 请输入 1 - 5 \n", stderr);
d_stdin();
}
if (num < 1 || num > 5)
{
fputs("错误: 请输入 1 - 5 \n", stderr);
d_stdin();
goto bk;
}
return num;
}
//显示菜单
char menu(char st[][20], int n)
{
char ch;
puts("****巨人航空座位预定管理系统****");
printf("当前航班: %s\n", st[n]);
puts("a. 显示空闲座位余数");
puts("b. 显示空闲座位列表");
puts("c. 显示按字母排列的座位列表");
puts("d. 给客户分配座位");
puts("e. 管理删除已分配的座位");
puts("f. 返回上一层");
puts("********************************");
bk:while (scanf_s("%c", &ch, 1) != 1)
{
fputs("错误: 请输入 a - f \n", stderr);
d_stdin();
}
if (ch < 'a' || ch > 'f')
{
fputs("错误: 请输入 a - f \n", stderr);
d_stdin();
goto bk;
}
return ch;
}
//抛弃多余字符
void d_stdin(void)
{
while (getchar() != '\n')
continue;
}
char *s_gets(char *st, int n)
{
char *ret_val, *find;
ret_val = fgets(st, n, stdin);
if (ret_val)
{
find = strchr(st, '\n');
if (find)
*find = '\0';
else
while (getchar() != '\n')
continue;
}
return ret_val;
}
10
#include <stdio.h>
//相加
void sum_1(double x, double y);
//相乘
void sum_2(double x, double y);
typedef void(*fp)(double x, double y);
int main()
{
double x = 3.6;
double y = 8.4;
int num;
fp fpun[2] = { sum_1,sum_2 };
puts("1. 相加 \t2. 相乘");
scanf_s("%d", &num);
switch (num)
{
case 1:
fpun[0](x, y);
break;
case 2:
fpun[1](x, y);
break;
default:
puts("输入错误");
break;
}
system("pause");
return 0;
}
void sum_1(double x, double y)
{
printf("%g + %g = %g\n", x, y, x + y);
}
void sum_2(double x, double y)
{
printf("%g x %g = %g\n", x, y, x * y);
}
11
#include <stdio.h>
#include <math.h>
#define SIZE 100
//数组赋值
void value(double *ps, int n);
//计算
void transform(double *ps1, double *ps2, int n, double(*fp)(double x));
//显示
void show(double *ps, int n, int m);
//平方
double square(double x);
//立方
double cube(double x);
int main()
{
double num_a[SIZE];
double num_b[SIZE];
value(num_b, SIZE);
transform(num_a, num_b, SIZE, sin);
puts("sin: ");
show(num_a, SIZE, 5);
transform(num_a, num_b, SIZE, cos);
puts("cos: ");
show(num_a, SIZE, 5);
transform(num_a, num_b, SIZE, square);
puts("square: ");
show(num_a, SIZE, 8);
transform(num_a, num_b, SIZE, cube);
puts("cube: ");
show(num_a, SIZE, 9);
system("pause");
return 0;
}
double cube(double x)
{
return x * x * x;
}
double square(double x)
{
return x * x;
}
void value(double *ps, int n)
{
int i;
for (i = 0; i < n; i++)
ps[i] = i;
}
void transform(double *ps1, double *ps2, int n, double(*fp)(double x))
{
int i;
for (i = 0; i < n; i++)
ps1[i] = (*fp)(ps2[i]);
}
void show(double *ps, int n, int m)
{
int i;
if (m == 5)
{
for (i = 0; i < n; i++)
{
if (i % 10 == 0 && i != 0)
putchar('\n');
printf("%5.2f ", ps[i]);
}
}
else if (m == 8)
{
for (i = 0; i < n; i++)
{
if (i % 10 == 0 && i != 0)
putchar('\n');
printf("%8.2f ", ps[i]);
}
}
else if (m == 9)
{
for (i = 0; i < n; i++)
{
if (i % 10 == 0 && i != 0)
putchar('\n');
printf("%9.2f ", ps[i]);
}
}
putchar('\n');
}
