1、来源：同学大二下的期末大作业：网上购书系统项目。
2、运行环境：VisualStudio 2019
代码：
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#include"StdAfx.h"
#include<iostream>
#include"person.h"
#include<string.h>
#include"globalfunction.h"
#include"book.h"
#include"adm.h"
using namespace std;
extern book BOOK[1000];
extern int Booksum;
bool adm::check(char a[50], char b[50])
{
{if (!strcmp(ID, a) && !strcmp(key, b))
return true;
else
return false;
}
}
adm::adm()
{
strcpy_s(ID, "hansumer");
strcpy_s(key, "2252416");
}
void adm::ls()
{
load();
int k = 0;
while (k != Booksum)
{
cout << "ID:" << k << endl;
cout << "书名:" << BOOK[k].name << endl << "价格:" << BOOK[k].price << endl << "总数:"<<BOOK[k].sum<<endl;
cout << "作者:" << BOOK[k].author << endl << "出版社:" << BOOK[k].publish << endl << "简介 : "<<BOOK[k].brief<<endl;
if (BOOK[k].sum == 0)
cout << "该书库存为 0,请尽快补充库存!!!" << endl;
k++;
}
cout << "共计:" << Booksum << endl;
}
void adm::way()
{
start:
system("pause");
system("cls");
cout << "1:遍历图书" << endl;
cout << "2:添加图书" << endl;
cout << "3:修改图书" << endl;
cout << "4:删除图书" << endl;
cout << "5:遍历用户" << endl;
cout << "6:制表" << endl;
cout << "7:订单" << endl;
cout << "8:退出" << endl;
cout << "choice:";
int choice;
cin >> choice;
if (choice == 8)
exit(0);
if (choice == 1)
ls();
else if (choice == 2)
add();
else if (choice == 3)
change();
else if (choice == 4)
del();
else if (choice == 5)
userlook();
else if (choice == 6)
tab();
else if (choice == 7)
vieworder();
goto start;
}#include"StdAfx.h"
#include<iostream>
#include<fstream>
#include<string.h>
#include"adm.h"
#include"book.h"
#include"order.h"
#include"user.h"
#include"globalfunction.h"
using namespace std;
adm A;
book BOOK[1000];
user B[1000];
int Booksum = 0;
int Usersum = 0;
void load()
{
fstream file;
Booksum = 0;
file.open("book.txt", ios::in);
if (!file.is_open())
{
cout << "打开失败!" << endl;
A.way();
}
while (file.peek() != EOF)
{
file.read((char*)&BOOK[Booksum].price, sizeof(int));
file.read((char*)&BOOK[Booksum].sum, sizeof(int));
file.read(BOOK[Booksum].name, 50 * sizeof(char));
file.read(BOOK[Booksum].author, 50 * sizeof(char));
file.read(BOOK[Booksum].publish, 50 * sizeof(char));
file.read(BOOK[Booksum++].brief, 50 * sizeof(char));
}
file.close();
}
void userls(void)
{
load();
fstream file;
fstream com;
com.open("comment.txt", ios::in);
file.open("book.txt", ios::in);
int k = 0;
while (k != Booksum)
{
cout << "ID:" << k << endl;
cout << "书名:" << BOOK[k].name << endl << "价格:" << BOOK[k].price << endl << "总数:"<<BOOK[k].sum<<endl;
cout << "作者:" << BOOK[k].author << endl << "出版社:" << BOOK[k].publish << endl << "简介 : "<<BOOK[k].brief<<endl;
k++;
}
cout << "共计:" << Booksum << endl;
file.close();
}
void add(void)
{
fstream a;
a.open("book.txt", ios::out | ios::app);
int price, sum;
char name[50], author[50], publish[50], biref[50];
cout << "单价:";
cin >> price;
cout << "数量:";
cin >> sum;
cout << "名字:";
cin.get();
cin.getline(name, 50 * sizeof(char));
cout << "作者:";
cin.getline(author, 50 * sizeof(char));
cout << "出版社:";
cin.getline(publish, 50 * sizeof(char));
cout << "简介:";
cin.getline(biref, 50 * sizeof(char));
a.write((char*)&price, sizeof(price));
a.write((char*)&sum, sizeof(sum));
a.write(name, 50 * sizeof(char));
a.write(author, 50 * sizeof(char));
a.write(publish, 50 * sizeof(char));
a.write(biref, 50 * sizeof(char));
a.close();
cout << "add success!\n";
load();
}
void change(void)
{
load();
char name[50], author[50];
int ID, k;
char choice;
cout << "1)书名搜索\n2)作者搜索\n3)ID 搜索:";
cin >> k;
if (k == 1)
{
cout << "书名:";
cin.get();
cin.getline(name, 50 * sizeof(char));
ID = search(name, k);
}
if (k == 2)
{
cout << "作者:";
cin.get();
cin.getline(author, 50 * sizeof(char));
ID = search(author, k);
}
if (k == 3)
{
cout << "ID:";
cin >> k;
ID = search(k);
}
if (ID == -1)
{
cout << "没有找到!" << endl;
A.way();
}
else
{
cout << "名字:" << BOOK[ID].name << endl << "价格:" << BOOK[ID].price << endl << "总数:"<<BOOK[ID].sum<<endl;
cout << "是否修改名字？(Y or N):";
cin >> choice;
if (choice == 'y' || choice == 'Y')
{
cout << "修改后的名字:";
cin.get();
cin >> BOOK[ID].name;
}
cout << "修改后的价格:";
cin >> BOOK[ID].price;
cout << "修改后的总数:";
cin >> BOOK[ID].sum;
}
fstream file;
file.open("book.txt", ios::out);
for (int j = 0; j < Booksum; j++)
{
file.write((char*)&BOOK[j].price, sizeof(int));
file.write((char*)&BOOK[j].sum, sizeof(int));
file.write(BOOK[j].name, 50 * sizeof(char));
file.write(BOOK[j].author, 50 * sizeof(char));
file.write(BOOK[j].publish, 50 * sizeof(char));
file.write(BOOK[j].brief, 50 * sizeof(char));
}
file.close();
cout << "change success!" << endl;
load();
}
void bookwrite(void)
{
fstream file;
file.open("book.txt", ios::out);
for (int j = 0; j < Booksum; j++)
{
file.write((char*)&BOOK[j].price, sizeof(int));
file.write((char*)&BOOK[j].sum, sizeof(int));
file.write(BOOK[j].name, 50 * sizeof(char));
file.write(BOOK[j].author, 50 * sizeof(char));
file.write(BOOK[j].publish, 50 * sizeof(char));
file.write(BOOK[j].brief, 50 * sizeof(char));
}
file.close();
}
void del(void)
{
load();
int ID;
fstream file;
int k;
char name[50], author[50];
cout << "全部删除按 1,部分删除按 2:";
int choice;
cin >> choice;
if (choice == 1)
{
cout << "输入 1 确认全部删除!!:";
cin >> choice;
if (choice == 1)
{
file.open("book.txt", ios::out);
file.close();
}
}
if (choice == 2)
{
cout << "1)书名搜索\n2)作者搜索\n3)ID 搜索:";
cin >> k;
if (k == 1)
{
cout << "书名:";
cin.get();
cin.getline(name, 50 * sizeof(char));
ID = search(name, k);
}
if (k == 2)
{
cout << "作者:";
cin.get();
cin.getline(author, 50 * sizeof(char));
ID = search(author, k);
}
if (k == 3)
{
cout << "ID:";
cin >> k;
ID = search(k);
}
if (ID == -1)
cout << "没有找到!" << endl;
else
{
cout << BOOK[ID].name << endl;
BOOK[ID].sum = -1;
file.open("book.txt", ios::out);
k = 0;
while (k != Booksum)
{
if (BOOK[k].sum != -1)
{
file.write((char*)&BOOK[k].price, sizeof(int));
file.write((char*)&BOOK[k].sum, sizeof(int));
file.write(BOOK[k].name, 50 * sizeof(char));
file.write(BOOK[k].author, 50 * sizeof(char));
file.write(BOOK[k].publish, 50 * sizeof(char));
file.write(BOOK[k].brief, 50 * sizeof(char));
}
k++;
}
cout << "del success" << endl;
}
} file.close();
load();
}
int search(char* a, int choice)
{
load();
if (choice == 1)
{
for (int j = 0; j < Booksum; j++)
{
if (!strcmp(BOOK[j].name, a))
return j;
}
return -1;
}
if (choice == 2)
{
for (int j = 0; j < Booksum; j++)
{
if (!strcmp(BOOK[j].author, a))
return j;
}
return -1;
}
else
return -1;
}
int search(int choice)
{
load();
if (choice >= Booksum || choice < 0)
return -1;
else
return choice;
}
void userload()
{
fstream file;
Usersum = 0;
file.open("user.txt", ios::in);
if (file.is_open())
{
while (file.peek() != EOF)
{
file.read((char*)&B[Usersum].ID, 50 * sizeof(char));
file.read((char*)&B[Usersum].key, 50 * sizeof(char));
file.read((char*)&B[Usersum].history, 2500 * sizeof(char));
file.read((char*)&B[Usersum].buy, 2500 * sizeof(char));
file.read((char*)&B[Usersum].buyprice, 50 * sizeof(int));
file.read((char*)&B[Usersum].buysum, 50 * sizeof(int));
file.read((char*)&B[Usersum].number, sizeof(int));
Usersum++;
}
}
file.close();
}
void useradd()
{
fstream file;
file.open("user.txt", ios::out | ios::app);
file.write((char*)&B[Usersum].ID, 50 * sizeof(char));
file.write((char*)&B[Usersum].key, 50 * sizeof(char));
file.write((char*)&B[Usersum].history, 2500 * sizeof(char));
file.write((char*)&B[Usersum].buy, 2500 * sizeof(char));
file.write((char*)&B[Usersum].buyprice, 50 * sizeof(int));
file.write((char*)&B[Usersum].buysum, 50 * sizeof(int));
file.write((char*)&B[Usersum].number, sizeof(int));
Usersum++;
file.close();
}
void userwrite()
{
fstream file;
file.open("user.txt", ios::out);
for (int k = 0; k < Usersum; k++)
{
file.write((char*)&B[k].ID, 50 * sizeof(char));
file.write((char*)&B[k].key, 50 * sizeof(char));
file.write((char*)&B[k].history, 2500 * sizeof(char));
file.write((char*)&B[k].buy, 2500 * sizeof(char));
file.write((char*)&B[k].buyprice, 50 * sizeof(int));
file.write((char*)&B[k].buysum, 50 * sizeof(int));
file.write((char*)&B[k].number, sizeof(int));
}
file.close();
userload();
}
void userlook()
{
userload();
for (int j = 0; j < Usersum; j++)
cout << "ID:" << B[j].ID << endl;
cout << "共计" << Usersum << "个用户" << endl;
}
bool same(char ID[50])
{
userload();
for (int j = 0; j < Usersum; j++)
if (!strcmp(ID, B[j].ID))
return true;
return false;
}
void comment(int ID)
{
fstream file;
file.open("comment.txt", ios::in);
char name[50];
char comment[1000];
cout << "评论区:" << endl;
while (file.peek() != EOF)
{
file.read(name, 50 * sizeof(char));
file.read(comment, 1000 * sizeof(char));
if (!strcmp(name, BOOK[ID].name))
cout << comment << endl;
}
}
void seek(string a)
{
load();
string b;
cout << "在书名中查找中..." << endl;
for (int k = 0; k < Booksum; k++)
{
b = BOOK[k].name;
if (b.find(a) != string::npos)
cout << "ID:" << k << endl << "书名:" << BOOK[k].name << endl << "作者:"<<BOOK[k].author<<endl<<endl;
}
cout << "在作者中查找..." << endl;
for (int l = 0; l < Booksum; l++)
{
b = BOOK[l].author;
if (b.find(a) != string::npos)
cout << "ID:" << l << endl << "书名:" << BOOK[l].name << endl << "作者:"<<BOOK[l].author<<endl<<endl;
}
cout << "在出版社中查找..." << endl;
for (int m = 0; m < Booksum; m++)
{
b = BOOK[m].publish;
if (b.find(a) != string::npos)
cout << "ID:" << m << endl << "书名:" << BOOK[m].name << endl << "作者:"<<BOOK[m].author<<endl<<endl;
}
}
void tab()
{
load();
cout << "1)售价制表 2)数量制表 3)销量制表" << endl;
int choice;
cin >> choice;
if (choice == 1)
{
int temp[1000][2];
int t;
for (int k = 0; k < Booksum; k++)
{
temp[k][0] = k;
temp[k][1] = BOOK[k].price;
}
for (int i = 0; i < Booksum; i++)
for (int j = 0; j < Booksum -j- 1; j++)
{
if (temp[j][1] < temp[j + 1][1])
{
t = temp[j][1];
temp[j][1] = temp[j + 1][1];
temp[j + 1][1] = t;
t = temp[j][0];
temp[j][0] = temp[j + 1][0];
temp[j + 1][0] = t;
}
}
for (int l = 0; l < Booksum; l++)
for (int j = 0; j < Booksum; j++)
{
if (j == temp[l][0])
{
cout << l + 1 << ":" << BOOK[j].name << " 价格:" << BOOK[j].price << endl;
break;
}
}
}
else if (choice == 2)
{
int temp[1000][2];
int t;
for (int k = 0; k < Booksum; k++)
{
temp[k][0] = k;
temp[k][1] = BOOK[k].sum;
}
for (int m = 0; m < Booksum; m++)
for (int j = 0; j < Booksum - m - 1; j++)
{
if (temp[j][1] < temp[j + 1][1])
{
t = temp[j][1];
temp[j][1] = temp[j + 1][1];
temp[j + 1][1] = t;
t = temp[j][0];
temp[j][0] = temp[j + 1][0];
temp[j + 1][0] = t;
}
}
for (int n = 0; n < Booksum; n++)
for (int j = 0; j < Booksum; j++)
{
if (j == temp[n][0])
cout << n + 1 << ":" << BOOK[j].name << " 数量:" << BOOK[j].sum << endl;
}
}
else if (choice == 3)
{
fstream file;
file.open("order.txt", ios::in);
int sum[1000][2];
int ID, temp, num = 0;
int k;
for (int l = 0; l < 10; l++)
{
sum[l][0] = -1;
sum[l][1] = 0;
}
bool flag = false;
char b[50], a[50];
while (file.peek() != -1)
{
file.read(b, 50 * sizeof(char));
file.read(a, 50 * sizeof(char));
for (k = 0; k < 10; k++)
{
if (sum[k][0] == search(a, 1))
{
flag = true;
break;
}
}
file.read((char*)&temp, sizeof(int));
if (flag)
sum[k][1] += temp;
else
{
sum[num][0] = search(a, 1);
sum[num][1] += temp;
num++;
}
flag = false;
}
for (k = 0; k < num; k++)
for (int j = 0; j < num - k - 1; j++)
{
if (sum[j][1] < sum[j + 1][1])
{
temp = sum[j][0];
sum[j][0] = sum[j + 1][0];
sum[j + 1][0] = temp;
temp = sum[j][1];
sum[j][1] = sum[j + 1][1];
sum[j + 1][1] = temp;
}
}
for (int n = 0; n < num; n++)
{
ID = search(sum[n][0]);
strcpy_s(a, BOOK[ID].name);
cout << a << " " << sum[n][1] << "本" << endl;
}
file.close();
}
}
void vieworder()
{
fstream file;
file.open("order.txt", ios::in);
char ID[50], name[50];
int sum;
while (file.peek() != -1)
{
file.read(ID, 50 * sizeof(char));
file.read(name, 50 * sizeof(char));
file.read((char*)&sum, sizeof(int));
cout << "ID:" << ID << " 书名:" << name << " 数量" << sum << endl;
}
file.close();
}#include"StdAfx.h"
#include <iostream>
#include<fstream>
#include<string.h>
#include"globalfunction.h"
#include"adm.h"
#include"book.h"
#include"order.h"
#include"user.h"
extern user B[1000];
extern int Usersum;
extern adm A;
int main(int argc, char** argv) {
int choice, k;
char ID[50];
char key[50];
char userID[50];
char userkey[50];
cout << "1)顾客\n" << "2)管理员" << endl << "登录为:";
cin >> choice;
cin.get();
if (choice == 1)
{
userload();
cout << "1)登陆 2)注册:";
cin >> choice;
cin.get();
if (choice == 1)
{
step1:
cout << "账号:";
cin >> userID;
cout << "密码:";
cin >> userkey;
for (k = 0; k < Usersum; k++)
{
if (B[k].check(userID, userkey))
{
cout << "登陆成功!" << endl;
system("pause");
system("cls");
break;
}
}
if (k == Usersum)
{
cout << "账号与密码不匹配!" << endl;
goto step1;
}
B[k].way();
}
else if (choice == 2)
{
step2:
cout << "账号:";
cin >> userID;
if (userID[0] <= '9' && userID[0] >= '0')
{
cout << "首位不能为数字!" << endl;
goto step2;
}
if (same(userID))
{
cout << "该账号已经注册!" << endl;
goto step2;
}
cout << "密码:";
cin >> userkey;
B[Usersum].create(userID, userkey);
useradd();
cout << "注册成功!" << endl;
B[Usersum - 1].way();
}
}
else if (choice == 2)
{
step3:
cout << "账号:";
cin >> ID;
cout << "密码:";
cin >> key;
if (A.check(ID, key))
A.way();
else
{
cout << "账号与密码不匹配!";
goto step3;
}
}
return 0;
}#include"StdAfx.h"
#include"order.h"
#include<string.h>
void order::set(char a[50], char b[50], int c)
{
strcpy_s(ID, a);
strcpy_s(name, b);
sum = c;
}#include"StdAfx.h"
#include<iostream>
#include<string.h>
using namespace std;
#include"person.h"
bool person::check(char a[50], char b[50])
{
{if (!strcmp(ID, a) && !strcmp(key, b))
return true;
else
return false;
}
}#include"StdAfx.h"
#include"globalfunction.h"
#include<string>
#include<string.h>
#include"book.h"
#include<fstream>
#include"adm.h"
#include"stdlib.h"
extern adm A;
extern book BOOK[1000];
extern user B[1000];
extern int Booksum;
extern int Usersum;
bool user::check(char a[50], char b[50])
{
if (!strcmp(ID, a) && !strcmp(key, b))
return true;
else
return false;
}
void user::create(char a[50], char b[50])
{
strcpy_s(ID, a);
strcpy_s(key, b);
memset(history, 0, 2500 * sizeof(char));
memset(buy, 0, 2500 * sizeof(char));
for (int k = 0; k < 50; k++)
{
buyprice[k] = 0;
buysum[k] = 0;
}
number = 0;
}
void user::way()
{
int choice;
int k;
start:
system("pause");
system("cls");
cout << "1)遍历图书 2)购买图书 3)我的购物车 4)我的订单 5)评价图书 6)退出 : ";
cin >> choice;
cin.get();
if (choice != 0)
{
if (choice == 1)
{
userls();
}
else if (choice == 2)
{
char name[50], author[50];
int ID;
step:
cout << "1)精准查找 2)模糊查找:";
cin >> k;
if (k == 1)
{
cout << "1)书名搜索\n2)作者搜索\n3)ID 搜索:";
cin >> k;
if (k == 1)
{
cout << "书名:";
cin.get();
cin.getline(name, 50 * sizeof(char));
ID = search(name, k);
}
if (k == 2)
{
cout << "作者:";
cin.get();
cin.getline(author, 50 * sizeof(char));
ID = search(author, k);
}
if (k == 3)
{
cout << "ID:";
cin >> k;
ID = search(k);
}
if (ID == -1)
{
cout << "没有找到!" << endl;
goto step;
}
else
{
cout << "书名:" << BOOK[ID].name << endl << "价格:" << BOOK[ID].price << endl << "总数:"<<BOOK[ID].sum<<endl;
cout << "作者:" << BOOK[ID].author << endl << "出版社 : "<<BOOK[ID].publish<<endl<<"简介 : "<<BOOK[ID].brief<<endl;
comment(ID);
cout << "您是否想购买此书\n1)把此书添加到购物车 2)离开:";
cin >> choice;
if (choice == 1)
{
int a;
cout << "购买数量:";
cin >> a;
if (a > BOOK[ID].sum)
{
cout << "您购买的数量大于库存,无法购买!" << endl;
goto start;
}
if (a < 0)
{
cout << "错误的数量!" << endl;
goto start;
}
strcpy_s(buy[number], BOOK[ID].name);
buyprice[number] = BOOK[ID].price;
buysum[number] = a;
number++;
cout << "添加成功!" << endl;
}
userwrite();
goto start;
}
}
else if (k == 2)
{
cout << "输入查找内容:";
string enter;
cin >> enter;
seek(enter);
goto start;
}
}
else if (choice == 3)
{
int b = 0;
for (int k = 0; k < number; k++)
{
cout << buy[k] << " 单价:" << buyprice[k] << " 数量:" << buysum[k] << endl;
b += buyprice[k] * buysum[k];
}
cout << "小计:" << b << "元" << endl;
if (b != 0)
{
cout << "购买?(Y/N):";
char choice;
cin >> choice;
if (choice == 'y' || choice == 'Y')
{
fstream file;
file.open("order.txt", ios::out | ios::app);
int historynum = 0;
for (historynum; history[historynum][0] != 0; historynum++)
;
for (int k = historynum; k < historynum + number; k++)
strcpy_s(history[k], buy[k - historynum]);
for (int l = 0; l < number; l++)
{
file.write(ID, 50 * sizeof(char));
file.write(buy[l], 50 * sizeof(char));
file.write((char*)&buysum[l], sizeof(int));
}
file.close();
int ID;
for (int m = 0; m < number; m++)
{
ID = search(buy[m], 1);
BOOK[ID].sum -= buysum[m];
buyprice[m] = 0;
buysum[m] = 0;
}
memset(buy, 0, 2500 * sizeof(int));
number = 0;
cout << "感谢您的购买!" << endl;
bookwrite();
}
userwrite();
}
goto start;
}
else if (choice == 4)
{
for (int k = 0; history[k][0] != 0; k++)
cout << k + 1 << ": " << history[k] << endl;
if (history[0][0] == 0)
cout << "您的购买历史为空!" << endl;
goto start;
}
else if (choice == 5)
}
项目结构：
运行结果截图：
3、主要问题
1)书名查找功能未完善，有时会出现乱码
2）评价系统还未完成
4、改进新代码
1）对存放数据的文件的编码格式进行了更改
2）
点击查看代码
{
char name[50], author[50];
int ID;
cout << "1)书名搜索\n2)作者搜索\n3)ID 搜索:";
cin >> k;
if (k == 1)
{
cout << "书名:";
cin.get();
cin.getline(name, 50 * sizeof(char));
ID = search(name, k);
}
if (k == 2)
{
cout << "作者:";
cin.get();
cin.getline(author, 50 * sizeof(char));
ID = search(author, k);
}
if (k == 3)
{
cout << "ID:";
cin >> k;
ID = search(k);
}
if (ID == -1)
{
cout << "没有找到!" << endl;
way();
}
else
{
cout << "您要评价的书是:" << BOOK[ID].name << endl;
int power = 0;
for (int k = 0; history[k][0] != 0; k++)
if (!strcmp(history[k], BOOK[ID].name))
{
power = 1;
break;
}
if (power == 0)
{
cout << "您没有购买过此书,无权评论!" << endl;
goto start;
}
else
{
cout << "请输入您的评论:";
char comment[1000];
cin >> comment;
fstream file;
file.open("comment.txt", ios::out | ios::app);
file.write(BOOK[ID].name, 50 * sizeof(char));
file.write(comment, 1000 * sizeof(char));
file.close();
goto start;
}
}
}
else if (choice == 6)
exit(0);
goto start;
}
5、重构的软件测试截图
6、总结
在这次代码的二次开发中，我深刻的明白了在写代码之前先理清楚结构的重要性，同时我也明白了代码注释的重要性。不然代码的可读性会大大下降，以至于找到同学本人也一时半会读不懂自己写的代码。完成体量稍大的代码前要有一个清晰的规划，而不是写到哪里就是哪里。