C语言大作业:车辆管理系统
流程图
代码
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
#include<conio.h>
typedef struct car;
typedef struct list_car;
typedef struct list_car_sequence;
list_car* rear;
list_car* head;
list_car* read_list_car();
void write_list_car(list_car* head);
void list_car_write();
void list_car_alter(list_car* head);
void list_car_delete();
void search_prize(list_car* head);
void search_other(list_car* head);
list_car_sequence* list_dissequence(list_car_sequence* dissequence, list_car* p);
list_car_sequence* list_sequence(list_car_sequence* sequence_head, list_car* p, int i);
/* 数据模型 */
struct car {
char type_of_name[10];//车型
char manufacturer[10];//厂商
char model_class[10];//车型级别
char transmission_case[10];//变速箱
char color[10];//颜色
char math[3][10];//0是价格 1是排量 2是座位数
};
/* 链表 */
struct list_car {
car* imformation;
list_car* next;
};
/* 按顺序排列链表 */
struct list_car_sequence {
char name[10];
char imformation[10];
list_car_sequence* next;
};
/* [结构体] 从 [文本] 获得信息 */
list_car* read_list_car() {//-->改动后
FILE* fp;
list_car* create, * head = NULL;
int num = 0;
if ((fp = fopen("car.txt", "r")) == NULL) {
printf("打开文件失败");
exit(0);
}
create = rear = (list_car*)malloc(sizeof(list_car));
create->imformation = (car*)malloc(sizeof(car));
while ((fread(create->imformation, sizeof(car), 1, fp)) != 0) {
num++;
if (num == 1)
head = rear;
else
rear->next = create;
rear = create;
create = (list_car*)malloc(sizeof(list_car));
create->imformation = (car*)malloc(sizeof(car));
}
if (num != 0)
rear->next = NULL;
free(create->imformation);
free(create);
fclose(fp);
printf("录入成功");
return head;
}
/* [文本] 从 [结构体] 获得信息 */
void write_list_car(list_car* head) {//-->改动后
FILE* fp;
if ((fp = fopen("car.txt", "w")) == NULL) {
printf("打开文件失败");
exit(0);
}
list_car* p = head;
for (;p != NULL;p = p->next) fwrite(p->imformation, sizeof(car), 1, fp);
printf("写入文件成功!\n");
fclose(fp);
}
/******************************************************//* 修改 *//*************************************************************/
/* 录入车辆信息进 [结构体内] */
void list_car_write() {
list_car* p = (list_car*)malloc(sizeof(list_car));
p->next = NULL;//容易漏
p->imformation = (car*)malloc(sizeof(car));
printf("请输入\n");
scanf_s("%s %s %s %s %s %s %s %s", p->imformation->type_of_name, sizeof(char)*10
, p->imformation->manufacturer, sizeof(char) * 10, p->imformation->model_class
, sizeof(char) * 10, p->imformation->math[2], sizeof(char) * 10
, p->imformation->math[1], sizeof(char) * 10, p->imformation->transmission_case
, sizeof(char) * 10, p->imformation->color, sizeof(char) * 10, p->imformation->math[0], sizeof(char) * 10);
getchar();
printf("%-10s""%-10s""%-10s""%10s座""%10sT\t""%-10s""%-10s""%10s万\n", p->imformation->type_of_name, p->imformation->manufacturer, p->imformation->model_class, p->imformation->math[2], p->imformation->math[1], p->imformation->transmission_case, p->imformation->color, p->imformation->math[0]);
getch();
if (head == NULL)
head = rear = p;
else {
rear->next = p;
rear = p;
}
}
/* 修改 [结构体内] 车辆具体信息 */
void list_car_alter(list_car* head) {
if (head == NULL) {
printf("头指针为空!\n");
return;
}
list_car* p = head;
char name[20];
printf("请输入型号:\n");
scanf_s("%s", name, sizeof(name));
getchar();
for (;p != NULL;p = p->next)
if (strcmp(name, p->imformation->type_of_name) == 0)
break;
if (p == NULL) {
printf("没有找到该类型!\n");
return;
}
printf("请输入修改类型的序号:\n");
printf("1车型\t2厂商\t3车型级别\t4座位数\t5排量\t6变速箱\t7颜色\t8价格\n");
char imformation;
imformation = getchar();getchar();
printf("请输入修改后内容\n");
switch (imformation)
{
case '1':scanf_s("%s", p->imformation->type_of_name, sizeof(char)*10);break;
case '2':scanf_s("%s", p->imformation->manufacturer, sizeof(char) * 10);break;
case '3':scanf_s("%s", p->imformation->model_class, sizeof(char) * 10);break;
case '4':scanf_s("%s", p->imformation->math[2], sizeof(char) * 10);break;
case '5':scanf_s("%s", p->imformation->math[1], sizeof(char) * 10);break;
case '6':scanf_s("%s", p->imformation->transmission_case, sizeof(char) * 10);break;
case '7':scanf_s("%s", p->imformation->color, sizeof(char) * 10);break;
case '8':scanf_s("%s", p->imformation->math[0], sizeof(char) * 10);break;
}
getchar();
printf("修改成功!\n");
getchar();
}
/* 删除 [结构体内] 车辆信息 */
void list_car_delete() {
if (head == NULL) {
printf("头指针为空!\n");
return;
}
printf("进入修改\n");
list_car* p = head,*t=head;
char name[20];
printf("请输入\n");
scanf_s("%s", name, sizeof(name));
getchar();
for (;p != NULL;p = p->next)
if (strcmp(name, p->imformation->type_of_name) == 0) {
printf("已找到\n");
break;
}
else
t = p;
if (p == NULL) {
printf("没有找到该类型!\n");
return;
}
printf("请输入删掉的内容\n");
char information;
printf("0删除车辆全部信息\t1车型\t2厂商\t3车型级别\t4座位数\t5排量\t6变速箱\t7颜色\t8价格\n");
loop:scanf_s("%c", &information, sizeof(information));
getchar();
switch (information) {//结构体里的字符型数组是不能被赋值的,我也不知道为什么.好像是被当成了常量
case '0':
if (p != head)
t->next = p->next;
else
head = head->next;
break;
case '1':strcpy(p->imformation->manufacturer, "无信息");break;
case '2':strcpy(p->imformation->model_class, "无信息");break;
case '3':strcpy(p->imformation->math[2], "无信息");break;
case '4':strcpy(p->imformation->math[1], "无信息");break;
case '5':strcpy(p->imformation->transmission_case, "无信息");break;
case '6':strcpy(p->imformation->color, "无信息");break;
case '7':strcpy(p->imformation->math[0], "无信息");break;
default:printf("无法识别该序号,请重新输入序号");goto loop;
}
printf("删除成功!\n");
getchar();
}
/******************************************************//* 修改 *//*************************************************************/
/******************************************************//* 输出 *//*************************************************************/
/* 查询 [结构体内] 车辆具体信息 */
void search(list_car* head) {
if (head == NULL) {
printf("头指针为空!\n");
return;
}
void search_prize(list_car * head);
void search_other(list_car * head);
char find[10] = { 0 };//字符初始化
printf("请输入你想查找的范围:例如 价格 、 厂商 、 车型级别 ,退出则输入 退出\n");
scanf_s("%s", find, sizeof(find));
while ((strcmp(find,"退出")!=0)) {
getchar();
if (strcmp(find, "价格") == 0)
search_prize(head);
else if (strcmp(find, "厂商") == 0 || strcmp(find, "车型级别") == 0)
search_other(head);
else
printf("搜索没有此项,请重新输入\n");
printf("请输入你想查找的范围:例如 价格 、 厂商 、 车型级别 ,退出则输入 退出\n");
scanf_s("%s", find, sizeof(find));
}
}
/*价格排序*/
void search_prize(list_car* head) {
list_car* p = head;
list_car_sequence* sequence_head = NULL;
float prize_down, prize_high;
printf("请依次输入最低价格和最高价格\n");
scanf_s("%f%f", &prize_down, &prize_high);
for (;p != NULL;p = p->next)
if (atof(p->imformation->math[0]) >= prize_down && atof(p->imformation->math[0]) <= prize_high)
sequence_head = list_sequence(sequence_head, p,0);
if (sequence_head == NULL) {
printf("该价格范围内无车辆型号:\n");
return;
}
for (;sequence_head != NULL;sequence_head = sequence_head->next,printf("\n"))
printf("%-10s\t%10s\n", sequence_head->name,sequence_head->imformation);
}
/* 查厂商或车型级别 */
void search_other(list_car* head) {
list_car* p = head;
list_car_sequence* dissequence_head=NULL;
printf("请输入你想找的内容:\n");
char name[20] = { 0 };
scanf_s("%s", name, sizeof(name));
getchar();
for (;p != NULL;p = p->next)
if (strcmp(name, p->imformation->manufacturer) == 0 || strcmp(name, p->imformation->model_class) == 0 ) {
dissequence_head = list_dissequence(dissequence_head, p);
}
if (dissequence_head == NULL) {
printf("没有找到相关内容!\n");
return;
}
for (;dissequence_head != NULL;dissequence_head = dissequence_head->next)
printf("%s\n", dissequence_head->name);
}
/* 价格排序 *//* 排量排序 *//* 座位数排序 */
list_car_sequence* list_sequence(list_car_sequence* sequence_head, list_car* p,int i) {
if (sequence_head == NULL) {
sequence_head = (list_car_sequence*)malloc(sizeof(list_car_sequence));
strcpy(sequence_head->imformation, p->imformation->math[i]);
strcpy(sequence_head->name, p->imformation->type_of_name);
sequence_head->next = NULL;
return sequence_head;
}
else {
list_car_sequence* t = sequence_head, * next = NULL, * x = sequence_head;
for (;sequence_head != NULL;sequence_head = sequence_head->next) {
if (atof(sequence_head->imformation) >= atof(p->imformation->math[i])) {
if (t == sequence_head) {
next = (list_car_sequence*)malloc(sizeof(list_car_sequence));
next->next = sequence_head;
strcpy(next->imformation, p->imformation->math[i]);
strcpy(next->name, p->imformation->type_of_name);
return next;
}
else {
next = (list_car_sequence*)malloc(sizeof(list_car_sequence));
t->next = next;
next->next = sequence_head;
strcpy(next->imformation, p->imformation->math[i]);
strcpy(next->name, p->imformation->type_of_name);
return x;
}
}
else
t = sequence_head;
}
if (sequence_head == NULL) {
next = (list_car_sequence*)malloc(sizeof(list_car_sequence));
strcpy(next->imformation, p->imformation->math[i]);
strcpy(next->name, p->imformation->type_of_name);
t->next = next;
next->next = NULL;
return x;
}
}
}
/* 无排序 */
list_car_sequence* list_dissequence(list_car_sequence* dissequence, list_car* p) {
if (dissequence == NULL) {
dissequence = (list_car_sequence*)malloc(sizeof(list_car_sequence));
strcpy(dissequence->name, p->imformation->type_of_name);
strcpy(dissequence->imformation,"/0");
dissequence->next = NULL;
return dissequence;
}
else {
list_car_sequence* creat = (list_car_sequence*)malloc(sizeof(list_car_sequence));
strcpy(creat->name, p->imformation->type_of_name);
strcpy(creat->imformation, "/0");
creat->next = dissequence;
return creat;
}
}
/* 浏览 [结构体内] 所有车辆信息 */
void export_list(list_car* head) {
list_car_sequence* prize_head=NULL, * seating_head=NULL, * output_head=NULL;
if (head == NULL){
printf("头指针为空!\n");
return;
}
else {
printf("车型\t\t厂商\t\t车型级别\t座位数\t 排量\t变速箱\t\t车身颜色\t价格\n");
printf("_______________________________________________________________________________________________________________\n");
int num = 0;
for (; head != NULL; head = head->next) {
num++;
printf("%-10s\t""%-10s\t""%-10s""%10s座""%10sT\t""%-10s\t""%-10s""%10s万\n", head->imformation->type_of_name, head->imformation->manufacturer, head->imformation->model_class, head->imformation->math[2], head->imformation->math[1], head->imformation->transmission_case, head->imformation->color, head->imformation->math[0]);
printf("\n");
prize_head = list_sequence(prize_head, head,0);
seating_head = list_sequence(seating_head, head, 2);
output_head = list_sequence(output_head, head, 1);
}
printf("一共有%02d辆车\n", num);
}
printf("从小到大类型:");
char c;
list_car_sequence* p;
printf("1价格 2座位数 3排量 CTRL+Z退出 ");
while (~(c = getchar())) {
switch (c) {
case '1':p = prize_head;break;
case '2':p = seating_head;break;
case '3':p = output_head;break;
default:system("cls");printf("请重新输入:");goto loop;
}
if (p == NULL) {
printf("没有信息!\n");
return;
}
printf("_____________\n");
for (;p != NULL;p = p->next,printf("\n"))
printf("%-10s\t\t%10s\n", p->name, p->imformation);
getchar();
loop: printf("1价格 2座位数 3排量 CTRL+Z退出 ");
}
}
/******************************************************//* 输出 *//*************************************************************/
int main() {
head = read_list_car();
char x;
printf("1为浏览所有信息 2为查询车辆具体信息 3录入新的车辆 4修改车辆信息 5为删除车辆信息 0为退出\n"
"请选择你想进行的功能:");
while ((x = getch())!='0') {
system("cls");
switch (x) {
case '1':export_list(head);break;
case '2':search(head);break;
case '3':list_car_write();break;
case '4':list_car_alter(head);break;
case '5':list_car_delete();break;
default:printf("输入有误,请重新输入:\n");getch();break;
}
system("cls");
printf("1为浏览所有信息 2为查询车辆具体信息 3录入新的车辆 4修改车辆信息 5为删除车辆信息 0为退出\n"
"请选择你想进行的功能:");
}
write_list_car(head);
return 0;
}