C++面向对象编程实例——实现学生信息的添加与查询

// ZhengTest.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"

#include <iostream>
#include <string>

using namespace std;
/*学生信息类*/
class stud_info
{
private:
string m_strName;//学生姓名
string m_strCode;//学生编号
string m_strTel;//联系方式
public:
stud_info(string strName = "",string strCode = "",string strTel = "")//构造函数
{
m_strName=strName;
m_strCode=strCode;
m_strTel=strTel;
pNext=NULL;
}

stud_info *pNext;
string GetName();//获得学生姓名
string GetCode();//获得学生学编号
string GetTel();//获得学生联系方式

};
/*信息消息类*/
class info_mag
{
private:
int m_iMaxCapacity;     //信息管理允许的最大容量
int m_iInfoLength;      //目前存储的信息容量
stud_info *Head;		//列表头指针
public:
/*构造函数*/
info_mag(int Length = 0,int Max = 5)
{
m_iMaxCapacity = Max;
m_iInfoLength = Length;
this->Head = new stud_info();
}
/*获取当前列表长度*/
int GetCurrentLength()
{
return m_iInfoLength;
}
/*获得头指针*/
stud_info *GetPHead()
{
return this->Head;
}
/*设定头指针*/
stud_info *SetPHead(stud_info *pNext)
{
this->Head = pNext;
return this->Head;
}
/*打印列表信息*/
bool writeAll()
{
stud_info *p  = new stud_info();
cout<<"姓名"<<"\t学号"<<"\t电话"<<endl;
p = Head;
while (p->pNext != NULL)
{
cout<<p->GetName()<<"\t"<<p->GetCode()<<"\t"<<p->GetTel()<<endl;
p = p->pNext;
}

if(p->pNext == NULL)
{
cout<<p->GetName()<<"\t"<<p->GetCode()<<"\t"<<p->GetTel()<<endl;
}

return true;
}
/*添加列表信息*/
bool Add(stud_info &m_info)
{

stud_info *p  = new stud_info();
stud_info *q  = new stud_info();
if(this->m_iInfoLength <= this->m_iMaxCapacity)
{
if(GetCurrentLength() == 0)
{
this->Head = &m_info;
this->m_iInfoLength++;
}
else
{
p = this->Head;
q = p;
while(p->pNext!=NULL)
{
q = p;
p = p->pNext;
}

p->pNext = &m_info;
this->m_iInfoLength++;

}
return true;
}
else
{
return false;
}

}
/*查询学生信息*/
stud_info *Select(string strName)
{
stud_info *p = new stud_info();
stud_info *q = new stud_info();

p = Head;
while (p->pNext != NULL)
{
if(p->GetName() == strName)
{
return p;
}
q = p;
p = p->pNext;

if(p == NULL)
{
return NULL;
}

}

if ((p->GetName()) != strName)
{
return NULL;
}
else
{
return p;
}

}

};
/*获得学生姓名*/
string stud_info ::GetName()
{
return m_strName;
}
/*获得学生编号*/
string stud_info::GetCode()
{
return m_strCode;
}
/*获得学生联系方式*/
string stud_info::GetTel()
{
return m_strTel;
}

int _tmain(int argc, _TCHAR* argv[])
{
string s = "";
info_mag infm = info_mag();//创建列表对象

//创建5个学生信息对象
stud_info m_info = stud_info("Sam","001","1356688789");
stud_info m_info2 = stud_info("Bob","002","1356688790");
stud_info m_info3 = stud_info("Jack","003","1356688790");
stud_info m_info4 = stud_info("Lucy","004","1356688790");
stud_info m_info5 = stud_info();

//向列表中添加学生信息
infm.Add(m_info);
infm.Add(m_info2);
infm.Add(m_info3);
infm.Add(m_info4);
//打印学生信息
infm.writeAll();
cout<<"是否添加新学生信息？(y/n)"<<endl;
char c = 'n';
cin>>c;
if (c == 'y'||c == 'Y')
{
string sName;
string sCode;
string sTel;

cout<<"输入姓名："<<endl;
cin>>sName;
cout<<"输入学号："<<endl;
cin>>sCode;
cout<<"输入联系方式："<<endl;
cin>>sTel;

m_info5 = stud_info(sName,sCode,sTel);

if (infm.Select(sName) == NULL)
{
infm.Add(m_info5);
}
}

cout<<"请输入您要查询的姓名："<<endl;
cin>>s;

//查询学生信息
stud_info *p= new stud_info();
p = infm.Select(s);

if (p != NULL)
{
cout<<"\n找到查询信息：\n"<<endl;
cout<<"姓名："<<p->GetName()<<"\n学号："<<p->GetCode()<<"\n电话："<<p->GetTel()<<endl;
}
else
{
cout<<"\n您所查询的姓名不存在！\n"<<endl;
}
cout<<"按任意键结束！"<<endl;
getchar();
return 0;
}