// telemanage.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <cstdio>
#include <string>
#include <iostream>
using namespace std;
//--------------------------------------------------------------------------------


typedef struct
{
    string name;//姓名
    string telephonenum;//电话号码
}TouchedPerson;


//------------------------------------------------------------------------------
//添加联系人
void AddTelenum(void)
{
    FILE *telephonebook;//文件指针
    TouchedPerson *people=NULL;
   
    if( (telephonebook = fopen("通讯录.txt","a+"))==NULL )
    {
        cout<<"文件无法打开!"<<endl;
        exit(0);
    }

    people = new TouchedPerson;

    if( people = NULL )
    {
        cout<<"内存分配失败!"<<endl;
        exit(0);
    }

    cout<<"输入联系人姓名：";
    cin>>people->name;
    getchar();
    cout<<"联系人电话:";
    cin>>people->telephonenum;
   
    string choice;
    cout<<"是否保存该人?"<<endl;
    cout<<"是请按Y或y,否按其他任意键:";
    cin>>choice;
    if( !((choice=="Y") || (choice=="y")) )
    {
        if( fwrite(people, sizeof(TouchedPerson), 1, telephonebook) !=1 )
            cout<<"读入信息失败!"<<endl;
        else
            cout<<"信息保存成功!"<<endl;
    }
    else
        cout<<"此人信息未存入通信录!"<<endl;

    delete people;//释放指针
    fclose(telephonebook);
}//----------------------------------------------------------------------------

//查找联系人
void SearchPeople(void)
{
    FILE *telephonebook;//文件指针
    TouchedPerson *people=NULL;
   
    if((telephonebook = fopen("通讯录.txt","a+"))==NULL)
    {
        cout<<"文件无法打开!"<<endl;
        exit(0);
    }

    people = new TouchedPerson;

    if( people = NULL )
    {
        cout<<"内存分配失败!"<<endl;
        exit(0);
    }

    string tempname;//待查找联系人的姓名

    cout<<"输入联系人姓名：";
    cin>>tempname;
    while( fread(people, sizeof(TouchedPerson), 1, telephonebook) )
    {
        if( !(tempname == people->name) )
            cout<<people->name<<"    "<<people->telephonenum<<endl;
        else
            cout<<"不存在该联系人!"<<endl;
    }

    delete people;//释放指针
    fclose(telephonebook);
}//----------------------------------------------------------------------------------------------

//显示所有联系人
void ShowAllPeople(void)
{
    FILE *telephonebook;//文件指针
    TouchedPerson *people=NULL;
   
    if((telephonebook = fopen("通讯录.txt","a+"))==NULL)
    {
        cout<<"文件无法打开!"<<endl;
        exit(0);
    }

    people = new TouchedPerson;

    if( people = NULL )
    {
        cout<<"内存分配失败!"<<endl;
        exit(0);
    }

    while( fread(people, sizeof(TouchedPerson), 1, telephonebook) )
    {
        cout<<"姓名:"<<people->name<<"    "<<"电话:"<<people->telephonenum<<endl;
    }

    delete people;//释放指针
    fclose(telephonebook);
}//-----------------------------------------------------------------------------------------

//导航菜单


int menuchoice;//导航变量
void Menu(void)
{
    cout<<"**********欢迎使用通信录管理程序**********"<<endl;
    cout<<"（1）**********添加联系人！"<<endl;
    cout<<"（2）********显示当前通讯录！"<<endl;
    cout<<"（3）**********查找联系人！"<<endl;
    cout<<"（0）**********退出本程序！"<<endl;
    cout<<"请选择：";
    cin>>menuchoice;
}




int _tmain(int argc, _TCHAR* argv[])
{
    while( 1 )
    {
        Menu();

        switch( menuchoice )
        {
        case 1:
            AddTelenum();
            system("pause");
            system("cls");
            break;
        
        case 2:
            ShowAllPeople();
            system("pause");
            system("cls");
            break;
        case 3:
            SearchPeople();
            system("pause");
            system("cls");
            break;
        case 0:
            cout<<"谢谢使用!"<<endl;
            exit(0);
        default:
            cout<<"指令错误!"<<endl;
    }
    return 0;
}

}

不说明什么情况，别人是没法帮你查问题的。

先提出几个更改意见：
（我用的是DEV-C++）
1、把#include "stdafx.h"这一句注释掉，即：
　　//#include "stdafx.h"
2、 if( people = NULL )为错误语句，应改为
 if( people == NULL )
“=”为赋值，而“==”则是用于比较，后面的两个子函数也是一样。
3、查找联系人和显示联系人当中，为什么是“a+”而不是“a”？难道查找联系人和显示联系人也需要更改文件吗？
4、当我把上面的几处更改后，程序或以正常编译。但写入的文件为二进制码文件，而不是ASC码，这个地方还需要更改。

// telemanage.cpp : 定义控制台应用程序的入口点。
//

//#include "stdafx.h"
#include <cstdio>
#include <string>
#include <iostream>
using namespace std;
//--------------------------------------------------------------------------------


typedef struct
{
    string name;//姓名
    string telephonenum;//电话号码
}TouchedPerson;


//------------------------------------------------------------------------------
//添加联系人
void AddTelenum(void)
{
    FILE *telephonebook;//文件指针
    TouchedPerson *people=NULL;
   
    if( (telephonebook = fopen("通讯录.txt","a+"))==NULL )
    {
        cout<<"文件无法打开!"<<endl;
        exit(0);
    }

    people = new TouchedPerson;

    if( people == NULL )
//    if ( !people )
    {
        cout<<"内存分配失败!"<<endl;
        exit(0);
    }

    cout<<"输入联系人姓名：";
    cin>>people->name;
    getchar();
    cout<<"联系人电话:";
    cin>>people->telephonenum;
//    cout << endl;
//    getchar();
   
    string choice;
    cout<<"是否保存该人?"<<endl;
    cout<<"是请按Y或y,否按其他任意键:";
    cin>>choice;
    if( ((choice=="Y") || (choice=="y")) )
    {
        if( fwrite(people, sizeof(TouchedPerson), 1, telephonebook) !=1 )
            cout<<"写入信息失败!"<<endl;
        else
            cout<<"信息保存成功!"<<endl;
    }
    else
        cout<<"此人信息未存入通信录!"<<endl;

    delete people;//释放指针
    fclose(telephonebook);
}//----------------------------------------------------------------------------

//查找联系人
void SearchPeople(void)
{
    FILE *telephonebook;//文件指针
    TouchedPerson *people=NULL;
   
    if((telephonebook = fopen("通讯录.txt","a+"))==NULL)
    {
        cout<<"文件无法打开!"<<endl;
        exit(0);
    }

    people = new TouchedPerson;

    if( people == NULL )
    {
        cout<<"内存分配失败!"<<endl;
        exit(0);
    }

    string tempname;//待查找联系人的姓名

    cout<<"输入联系人姓名：";
    cin>>tempname;
    while( fread(people, sizeof(TouchedPerson), 1, telephonebook) )
    {
        if( !(tempname == people->name) )
            cout<<people->name<<"    "<<people->telephonenum<<endl;
        else
            cout<<"不存在该联系人!"<<endl;
    }

    delete people;//释放指针
    fclose(telephonebook);
}//----------------------------------------------------------------------------------------------

//显示所有联系人
void ShowAllPeople(void)
{
    FILE *telephonebook;//文件指针
    TouchedPerson *people=NULL;
   
    if((telephonebook = fopen("通讯录.txt","a+"))==NULL)
    {
        cout<<"文件无法打开!"<<endl;
        exit(0);
    }

    people = new TouchedPerson;

    if( people == NULL )
    {
        cout<<"内存分配失败!"<<endl;
        exit(0);
    }

    while( fread(people, sizeof(TouchedPerson), 1, telephonebook) )
    {
        cout<<"姓名:"<<people->name<<"    "<<"电话:"<<people->telephonenum<<endl;
    }

    delete people;//释放指针
    fclose(telephonebook);
}//-----------------------------------------------------------------------------------------

//导航菜单


int menuchoice;//导航变量
void Menu(void)
{
    cout<<"**********欢迎使用通信录管理程序**********"<<endl;
    cout<<"（1）**********添加联系人！"<<endl;
    cout<<"（2）********显示当前通讯录！"<<endl;
    cout<<"（3）**********查找联系人！"<<endl;
    cout<<"（0）**********退出本程序！"<<endl;
    cout<<"请选择：";
    cin>>menuchoice;
}




int main(int argc, char* argv[])
{
    while( 1 )
    {
        Menu();

        switch( menuchoice )
        {
        case 1:
            AddTelenum();
            system("pause");
            system("cls");
            break;
        
        case 2:
            ShowAllPeople();
            system("pause");
            system("cls");
            break;
        case 3:
            SearchPeople();
            system("pause");
            system("cls");
            break;
        case 0:
            cout<<"谢谢使用!"<<endl;
            exit(0);
        default:
            cout<<"指令错误!"<<endl;
    }
    return 0;
}

}

楼上是老师吗？很仔细啊，佩服。

请问一下这个程序实现什么的？

NOT BAD!