C++之客户消费积分管理系统

之前数据结构课程设计要求做这么一个小程序，现在贴上源码，来和大家进行交流学习，希望大家给出意见和建议

程序以链表为主要数据结构对客户信息进行存储，对身份证号码判断了位数及构成（前十七位为数字，最后一位是数字或X）

#include<iostream>
#include<iomanip>
#include "stdlib.h"
#include<string>
using namespace std;

bool isID(string &);
typedef struct cnode
{
char name[20];
string ID;
double consume;
double integer;
struct cnode *next;
}cnode;

void Initstack(cnode * &head)/*初始化链表*/
{
head= new cnode();  //开辟节点空间
head->next=NULL;
}

void Getelem (cnode *head);
void Search(cnode *head,string &ID);
void Amend(cnode *head,string &ID);
void Delete(cnode *head,string &ID);
void Showall(cnode *head);
void count(cnode *head);
double display_discount(double integer);

int main()
{
cnode *head;
int choice;
string y;
Initstack(head);
do
{
cout<<endl;
cout<<"       客户消费 积分管理系统    "<<endl;
cout<<"  ******************************"<<endl;
cout<<"  *                            *"<<endl;
cout<<"  *          主菜单            *"<<endl;
cout<<"  *       1  添加客户          *"<<endl;
cout<<"  *       2  查找客户          *"<<endl;
cout<<"  *       3  修改客户          *"<<endl;
cout<<"  *       4  删除客户          *"<<endl;
cout<<"  *       5  显示客户          *"<<endl;
cout<<"  *       6  统计客户          *"<<endl;
cout<<"  *       7  退出              *"<<endl;
cout<<"  *                            *"<<endl;
cout<<"  ******************************"<<endl;
cout<<"请输入您的选择(1，2，3，4，5，6):";
cin>>choice;
if(choice==1)
Getelem(head);                                //添加
else if(choice==2)
{
cout<<"请输入您查找客户的身份证号:";
cin>>y;
isID(y);
Search(head,y);                           //查找
}
else if(choice==3)
{
cout<<"请输入您想修改客户的身份证号:";
cin>>y;
isID(y);
Amend(head,y);
}                             //修改
else if(choice==4)
{
cout<<"请输入你想要删除的客户的身份证号：";
cin>>y;
isID(y);
Delete(head,y);
}                          //删除
else if(choice==5)
Showall(head);                            //显示
else if(choice==6)
count(head);             //统计
else if(choice==7)
exit(1);
}
while(choice<=7);
system("pause");
return 0;
}
void Getelem (cnode *head)
{
//添加客户函数以头节点为参数
cnode *p;
double y;
p=new cnode;
p->next=new cnode;/*申请空的节点空间*/
p->ID=" ";
cout<<"请输入姓名：";
cin>>p->name;
cout<<"请输入身份证号(18位)：";
cin>>p->ID;
isID(p->ID);
cout<<"请输入消费金额：";
cin>>p->consume;
p->integer=p->consume/100;
cout<<"积分："<<p->integer<<endl;
y=display_discount(p->integer);                      //调用函数计算折扣
cout<<"折扣:"/*<<setprecision(1)*/<<y<<"折"<<endl;
p->next=head->next;
head->next=p;
}
void Search(cnode *head,string &ID)
{
cnode *p=new cnode;
double y;
p=head;
if(p->next==NULL)
cout<<"没有客户!"<<endl;
else
{
while(p->next!=NULL)
{
p=p->next;
if(ID==p->ID)          //判断身份证号是否相同
{
cout<<"姓名："<<p->name<<endl;
cout<<"身份证号："<<p->ID<<endl;
cout<<"消费："<</*setprecision(2)<<*/p->consume<<endl;
cout<<"积分:"<<p->integer<<endl;
y=display_discount(p->integer);
cout<<"折扣"<</*setprecision(1)<<*/y<<"折"<<endl;
return;
}
}
cout<<"不存在该客户！"<<endl;
}
}

/*
修改客户函数
通过ID获取信息
可以修改身份证号、姓名、消费金额
修改消费金额有覆盖原有金额及续加两种方式
*/
void Amend(cnode *head,string &ID){
cnode *p;
double y,z;
int choose,x;
p=head;
if(p->next==NULL)
cout<<"没有客户!"<<endl;
else
{
while(p->next!=NULL)
{
p=p->next;
if(ID==p->ID)     //判断身份证号是否相同
{
cout<<"姓名："<<p->name<<endl;
cout<<"身份证号："<<p->ID<<endl;
cout<<"消费："/*<<setprecision(2)*/<<p->consume<<endl;
cout<<"积分:"<</*setprecision(1)<<*/p->integer<<endl;
y=display_discount(p->integer);
cout<<"折扣:"<</*setprecision(1)<<*/y<<"折"<<endl;
cout<<"请选择你要修改的1、姓名。2、身份证号。3、消费金额。";
cin>>choose;
if(choose==1)
{
cout<<"请输入修改后姓名;";
cin>>p->name;
}
if(choose==2)
{
cout<<"请输入修改后的身份证号:";
cin>>p->ID;
isID(p->ID);
}
if(choose==3)
{
cout<<"1.覆盖以前消费、2.续加上现在费用!请选择:";
cin>>x;
if(x==1)
{
cout<<"请输入修改后的消费:";
cin>>p->consume;
}
else{
printf("请输入续加金额:");
cin>>z;
p->consume+=z;
}
}
cout<<"姓名："<<p->name<<endl;
cout<<"身份证号："<<p->ID<<endl;
cout<<"消费："<</*setprecision(2)<<*/p->consume<<endl;
p->integer=p->consume/100.0;
cout<<"积分:"<<p->integer<<endl;
y=display_discount(p->integer);
cout<<"折扣:"/*<<setprecision(1)*/<<y<<"折"<<endl;
return;
}
}
cout<<"不存在该客户！"<<endl;
}
}
void Delete(cnode *head,string &ID)
{
//删除客户函数
cnode *p;
int x;
double y;
p=head;
if(p->next==NULL)
cout<<"没有客户!"<<endl;
else
{
while(p->next!=NULL)
{
head=p;
p=p->next;
if(ID==p->ID)
{                 //判断身份证号是否相同
cout<<"姓名："<<p->name<<endl;
cout<<"身份证号："<<p->ID<<endl;
cout<<"消费："/*<<setprecision(2)*/<<p->consume<<endl;
cout<<"积分:"<<p->integer<<endl;
y=display_discount(p->integer);
cout<<"折扣:"<</*setprecision(1)<<*/y<<"折"<<endl;
cout<<"你确认删除？1、确定。2、取消。请选择:";
cin>>x;
if(x==1)
{
head->next=p->next;
cout<<("删除成功!");
}
else
cout<<"删除失败!";
return ;
}
}
cout<<"不存在该客户！"<<endl;
}
}
void Showall(cnode *head) //显示所有客户函数
{
cnode *p;
double y;
p=head;
if(p->next==NULL)
cout<<"没有客户!"<<endl;
else
while(p->next!=NULL)
{
p=p->next;
cout<<"姓名："<<p->name<<endl;
cout<<"身份证号："<<p->ID<<endl;
cout<<"消费："<</*setprecision(2)<<*/p->consume<<endl;
cout<<"积分："<<p->integer<<endl;
y=display_discount(p->integer);
cout<<"折扣："<</*setprecision(1)<<*/y<<"折"<<endl;
}
}

void count(cnode *head)
{
cnode *p;
int i=0;
p=head;
if(p->next==NULL)
cout<<"没有客户!"<<endl;
else
while(p->next!=NULL)
{
p=p->next;
i++;
}
cout<<"现有客户数量为"<<i<<"位!"<<endl;
}
double display_discount(double points)
{
//计算客户折扣函数，接受一个double型的数作为参数，输出对应的折扣
double discount;
if(points == 0)
discount = 0;
if(points > 0&&points <= 50)
discount = 9.8;
if(points > 50&&points <= 100)
discount = 9.5;
if(points > 100&&points <= 150)
discount = 9.2;
if(points > 150&&points <= 200)
discount = 9;
if(points > 200&&points <= 300)
discount = 8;
else if(points > 300)
discount = 7;
return discount;
}

int cal(string a)
{
return (a[0] - '0') * 7 + (a[1] - '0') * 9 + (a[2] - '0') * 10 +  (a[3] - '0') * 5 + (a[4] - '0') * 8 +
(a[5] - '0') *4  + (a[6] - '0') * 2 + (a[7] - '0') * 1 + (a[8] - '0') * 6 +(a[9] - '0') * 3 +
(a[10] - '0') * 7 + (a[11] - '0') * 9 + (a[12] - '0') * 10 + (a[13] - '0') * 5 + (a[14] - '0') * 8 +
(a[15] - '0') * 4 +(a[16] - '0') * 2;
}

char s(string a)
{
int k = cal(a) % 11;
if (k == 0)
return '1';
else if (k == 1)
return '0';
else if (k == 2)
return 'X';
else
return '0'+12-k;
}

bool isNumber(string str);
bool isID(string &number)
{
do
{
if(18==number.length()&&isNumber(number))
if (number[17] == s(number))
return true;
else
return false;
else
cout<<"输入格式不正确,请重新输入："<<endl;
}while (cin >> number);

}

bool isNumber(string str)
{
for(int i=0;i<str.length()-1;i++)
if(!isdigit(str[i]))
return false;
if((isdigit(str[str.length()-1]))||str[str.length()-1]=='X')
return true;
else
return false;
}

作者：耑新新，发布于 博客园

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