以下是借用的同学写的网上买菜系统的代码：
一、分析代码
buy.h文件
#include<iostream>
#include<string>
using namespace std;
class buyer
{
protected:
string name;
int buyerID;
int kilogram;
double pay;
public:
buyer();
buyer(string n, int b, int k, double p);
string getbuyname();
double getkilogram();
double getpay();
int getid();
virtual void display() = 0;
virtual void setpay(double = 0) = 0;
};
class layfolk :public buyer
{
public:
layfolk(string n, int b, int k, double p) :buyer(n, b, k, p)
{
}
void display();
void setpay(double p);
};
class member :public buyer
{
int leaguer_grade;
public:
member(string n, int b, int l, int k, double p) :buyer(n, b, k, p)
{
leaguer_grade = l;
}
void display();
void setpay(double p);
};
buyer::buyer()
{
name = "";
buyerID = 0;
kilogram = 0;
pay = 0;
}
buyer::buyer(string n, int b, int k, double p)
{
name = n;
buyerID = b;
kilogram = k;
pay = p;
}
double buyer::getpay()
{
return pay;
}
double buyer::getkilogram()
{
return kilogram;
}
string buyer::getbuyname()
{
return name;
}
int buyer::getid()
{
return buyerID;
}
void layfolk::display() //显示购菜人的信息和订单信息
{
cout <<"购菜人姓名:" << name << "\t";
cout <<"购菜人编号:" << buyerID << "\t";
cout <<"购菜人为" << "\t\t\t";
cout <<"购菜数量各为:" << kilogram <<"公斤\n";
}
void layfolk::setpay(double p) //价格计算公式
{
pay = pay + p*kilogram;
}
vegetables.h文件
#include<iostream>
#include<string>
using namespace std;
class vegetables
{
public:
int vegetables_number;
string vegetables_name;
string vegetables_date;
double price;
public:
vegetables();
vegetables(int v_num,string v_n, string v_d, double pr);
void display();
int getvegetables_number();
string getvegetables_name();
string getvegetables_date();
double getprice();
};
vegetables::vegetables(int v_num,string v_n, string v_d, double pr)
{
vegetables_number=v_num;
vegetables_name=v_n;
vegetables_date=v_d;
price = pr;
}
vegetables::vegetables()
{
vegetables_number=0;
vegetables_name= "";
vegetables_date= "";
price = 0;
}
void vegetables::display() //显示蔬菜信息
{
cout <<"蔬菜编号:"<<vegetables_number<<"\t\t";
cout << "蔬菜名称:" << vegetables_name << "\t\t";
cout << "蔬菜到货日期:" << vegetables_date << "\t\t";
cout << "定价:" << price << "\n";
}
int vegetables::getvegetables_number()
{
return vegetables_number;
}
string vegetables::getvegetables_name()
{
return vegetables_name;
}
string vegetables::getvegetables_date()
{
return vegetables_date;
}
double vegetables::getprice()
{
return price;
}
Main函数
#include<iostream>
#include<cassert>
#include<fstream>
#include<string>
#include"buy.h"
#include"vegetables.h"
using namespace std;
int main()
{ ifstream fin("C:\\Users\\39230\\Desktop\\蔬菜\\菜单信息.txt",ios::in); //打开文件
if(fin)
cout<<"\n"<<endl;
else
cout<<"文件打开失败"<<endl;
int i;
vegetables c[12];
for(i=0;i<12;i++)
{
fin>>c[i].vegetables_number>>c[i].vegetables_name>>c[i].vegetables_date>>c[i].price;
}
fin.close(); //关闭文件
int sum=0;
for(int q=0;q<12;q++) //统计价格
{
sum=sum+c[q].price;
}
char m;
while(m!=5)
{
system("cls"); //清屏
cout<<"\n";
cout<<" ****************************"<<endl;
cout<<" * 欢迎来到网上购菜系统 *"<<endl;
cout<<" *==========================*"<<endl;
cout<<" * 1.蔬菜信息 *"<<endl;
cout<<" * 2.订单人信息 *"<<endl;
cout<<" * 3.金额统计 *"<<endl;
cout<<" * 4.退出系统 *"<<endl;
cout<<" * 请选择功能1-4 *"<<endl;
cout<<" ****************************"<<endl; //显示开始界面
char k;
cin>>k;
fflush(stdin);
if ((k<1)&&(k>4))
{
cout<<"输入编号错误!"<<endl;
fflush(stdin);
return 0;
}
system("cls");
switch(k) //主界面跳转
{
case'1': //蔬菜信息
{
system("cls");
cout<<" ==========\n";
cout<<" |蔬菜信息|\n";
cout<<" ==========\n";
for (i = 0; i < 12; i++)
c[i].display();
fflush(stdin);
;}
break;
case'2': //订单人信息
{
system("cls");
layfolk b1("张三", 1, 10, 0);
member b2("李四",2,5,10,0);
buyer*b[2] = { &b1,&b2};
cout <<" ============\n";
cout <<" |购菜人信息|\n";
cout <<" ============\n";
for (i = 0; i < 3; i++)
b[i]->display();
}break;
case'3': //金额统计
{
system("cls");
int buyerid, flag;
layfolk b1("张三", 1, 90, 0);
member b2("李四",2,5,10,0);
buyer*b[1] = { &b1 ,&b2};
cout << "\n请输入购菜人编号：";
cin >> buyerid;
flag = 0;
for(i=0;i<3;i++)
if (b[i]->getid() == buyerid)
{
flag = 1;
break;
}
if (!flag)
{
cout << "编号不存在" << endl;
}
else
{
b[i]->setpay(sum);
cout << endl << "购菜人"<<b[i]->getbuyname()<<"需要付费:" << b[i]->getpay() << "元"<<"\n";
}
}break;
case'4': //退出系统
{
system("cls");
cout <<" ===============\n";
cout<<" |谢谢使用!再见!|"<<endl;
cout <<" ===============\n";
fflush(stdin);
return 0;
}
break;}
system("pause");
}
return 0;
}
运行结果：
二、增加功能
//顾客有会员和非会员之分，价格也会有所变化，添加了以下代码来实现不同顾客之间的购物价格的不同计算公式。
buy.h文件
#include<iostream>
#include<string>
using namespace std;
class buyer
{
protected:
string name;
int buyerID;
int kilogram;
double pay;
public:
buyer();
buyer(string n, int b, int k, double p);
string getbuyname();
double getkilogram();
double getpay();
int getid();
virtual void display() = 0;
virtual void setpay(double = 0) = 0;
};
class member :public buyer
{
int leaguer_grade;
public:
member(string n, int b, int l, int k, double p) :buyer(n, b, k, p)
{
leaguer_grade = l;
}
void display();
void setpay(double p);
};
class honoured_guest :public buyer
{
double discount_rate;
public:
honoured_guest(string n, int b, double r, int k, double p) :buyer(n, b, k, p)
{
discount_rate = r;
}
void display();
void setpay(double p);
};
class layfolk :public buyer
{
public:
layfolk(string n, int b, int k, double p) :buyer(n, b, k, p)
{
}
void display();
void setpay(double p);
};
buyer::buyer()
{
name = "";
buyerID = 0;
kilogram = 0;
pay = 0;
}
buyer::buyer(string n, int b, int k, double p)
{
name = n;
buyerID = b;
kilogram = k;
pay = p;
}
double buyer::getpay()
{
return pay;
}
double buyer::getkilogram()
{
return kilogram;
}
string buyer::getbuyname()
{
return name;
}
int buyer::getid()
{
return buyerID;
}
void member::display()
{
cout <<"购菜人姓名:" << name << "\t";
cout <<"购菜人编号:" << buyerID << "\t";
cout <<"购菜人为会员，级别:" << leaguer_grade << "\t\t";
cout <<"购菜数量各为:" << kilogram << "公斤\n";
}
void member::setpay(double p)
{
if (leaguer_grade == 1)
pay = 0.95*p*kilogram + pay;
else if (leaguer_grade == 2)
pay = 0.90*p*kilogram + pay;
else if (leaguer_grade == 3)
pay = 0.85*p*kilogram + pay;
else if (leaguer_grade == 4)
pay = 0.80*p*kilogram + pay;
else if (leaguer_grade == 5)
pay = 0.7*p*kilogram + pay;
else
cout <<"级别错误!";
}
void honoured_guest::display()
{
cout <<"购菜人姓名:" << name << "\t";
cout <<"购菜人编号:" << buyerID << "\t";
cout <<"购菜人为贵宾,折扣率为:" << discount_rate * 100 << "%\t";
cout <<"购菜数量各为:" << kilogram << "公斤\n";
}
void honoured_guest::setpay(double p)
{
pay = pay + (1 - discount_rate)*p*kilogram;
}
void layfolk::display()
{
cout <<"购菜人姓名:" << name << "\t";
cout <<"购菜人编号:" << buyerID << "\t";
cout <<"购菜人为普通人" << "\t\t\t";
cout <<"购菜数量各为:" << kilogram <<"公斤\n";
}
void layfolk::setpay(double p)
{
pay = pay + p*kilogram;
}
vegetables.h文件
#include<iostream>
#include<string>
using namespace std;
class vegetables
{
public:
int vegetables_number;
string vegetables_name;
string vegetables_date;
double price;
public:
vegetables();
vegetables(int v_num,string v_n, string v_d, double pr);
void display();
int getvegetables_number();
string getvegetables_name();
string getvegetables_date();
double getprice();
};
vegetables::vegetables(int v_num,string v_n, string v_d, double pr)
{
vegetables_number=v_num;
vegetables_name=v_n;
vegetables_date=v_d;
price = pr;
}
vegetables::vegetables()
{
vegetables_number=0;
vegetables_name= "";
vegetables_date= "";
price = 0;
}
void vegetables::display()
{
cout <<"蔬菜编号:"<<vegetables_number<<"\t\t";
cout << "蔬菜名称:" << vegetables_name << "\t\t";
cout << "蔬菜到货日期:" << vegetables_date << "\t\t";
cout << "定价:" << price << "\n";
}
int vegetables::getvegetables_number()
{
return vegetables_number;
}
string vegetables::getvegetables_name()
{
return vegetables_name;
}
string vegetables::getvegetables_date()
{
return vegetables_date;
}
double vegetables::getprice()
{
return price;
}
Main函数
#include<iostream>
#include<cassert>
#include<fstream>
#include<string>
#include"buy.h"
#include"vegetables.h"
using namespace std;
int main()
{ ifstream fin("C:\\Users\\39230\\Desktop\\蔬菜\\菜单信息.txt",ios::in);
if(fin)
cout<<"\n"<<endl;
else
cout<<"文件打开失败"<<endl;
int i;
vegetables c[12];
for(i=0;i<12;i++)
{
fin>>c[i].vegetables_number>>c[i].vegetables_name>>c[i].vegetables_date>>c[i].price;
}
fin.close();
int sum=0;
for(int q=0;q<12;q++)
{
sum=sum+c[q].price;
}
char m;
while(m!=5)
{
system("cls");
cout<<"\n";
cout<<" ****************************"<<endl;
cout<<" * 欢迎来到网上购菜系统 *"<<endl;
cout<<" *==========================*"<<endl;
cout<<" * 1.蔬菜信息 *"<<endl;
cout<<" * 2.订单人信息 *"<<endl;
cout<<" * 3.金额统计 *"<<endl;
cout<<" * 4.退出系统 *"<<endl;
cout<<" * 请选择功能1-4 *"<<endl;
cout<<" ****************************"<<endl;
char k;
cin>>k;
fflush(stdin);
if ((k<1)&&(k>4))
{
cout<<"输入编号错误!"<<endl;
fflush(stdin);
return 0;
}
system("cls");
switch(k)
{
case'1':
{
system("cls");
cout<<" ==========\n";
cout<<" |蔬菜信息|\n";
cout<<" ==========\n";
for (i = 0; i < 12; i++)
c[i].display();
fflush(stdin);
;}
break;
case'2':
{
system("cls");
layfolk b1("张三", 1, 10, 0);
honoured_guest b2("李四", 2, 0.6, 20, 0);
member b3("王五",3, 5, 15, 0);
buyer*b[3] = { &b1,&b2,&b3 };
cout <<" ============\n";
cout <<" |购菜人信息|\n";
cout <<" ============\n";
for (i = 0; i < 3; i++)
b[i]->display();
}break;
case'3':
{
system("cls");
int buyerid, flag;
layfolk b1("张三", 1, 90, 0);
honoured_guest b2("李四", 2, 0.6, 80, 0);
member b3("王五",3, 5, 100, 0);
buyer*b[3] = { &b1,&b2,&b3 };
cout << "\n请输入购菜人编号：";
cin >> buyerid;
flag = 0;
for(i=0;i<3;i++)
if (b[i]->getid() == buyerid)
{
flag = 1;
break;
}
if (!flag)
{
cout << "编号不存在" << endl;
}
else
{
b[i]->setpay(sum);
cout << endl << "购菜人"<<b[i]->getbuyname()<<"需要付费:" << b[i]->getpay() << "元"<<"\n";
}
}break;
case'4':
{
system("cls");
cout <<" ===============\n";
cout<<" |谢谢使用!再见!|"<<endl;
cout <<" ===============\n";
fflush(stdin);
return 0;
}
break;}
system("pause");
}
return 0;
}
三、测试用例
| 测试用例ID | 场景 | 测试步骤 | 预期结果 | 备注 |
| TC1 | 初始页面显示 | 运行程序 | 页面元素完整，显示与详细设计一致 | |
| TC2 | 用户会员等级录入—验证 | 输入已存在的用户“李四”的会员等级 | 输入成功 | |
| TC3 | 用户会员等级—容错性验证 | 输入：7778899 | 信息录入失败 | |
| TC4 | 主界面链接 | 输入1，2，3，4测试是否成功跳转 | 成功跳转 | |
| TC5 | 显示蔬菜信息 | 键盘输入1，文件导入蔬菜信息 | 导入成功并显示 | |
| TC6 | 订单人信息 | 键盘输入2，输入多位订单人信息，并选择一位显示 | 正确显示 | |
| TC7 | 金额统计 | 键盘输入3，输入非常大的购物清单，测试是否能计算准确 | 准确计算 | |
| TC8 | 退出程序 | 键盘输入4 | 成功退出程序 |