Linker Error

[fanronnie80]

I compiled the file, it showed no errors in Turbo C++. But when I run it , I get this error - "Linker Error: Unable to open file '..\SOURCE\MAIN.EXE'. I deleted the file and again pasted the file in the same directory but it showed the same error.

#include<fstream.h>
#include<iostream.h>
#include<conio.h>
#include<string.h>
#include<ctype.h>
#include<stdio.h>
#include<stdlib.h>
char ch;
fstream f;
enum Vacancy{Vacant,NotVacant};
enum Service{Pending,Done};
struct date
{
    int dd,mm,yy;
};

struct address
{   int houseno;
    char locality[50];
    char city[50];
};
class ROOM
{   private:
    int id;
    int members;
    char name[50];
    address house;
    public:
    int no;
    ROOM()
    {   no=0;
        id=0;
        members=0;
        strcpy(name,"NULL");
        house.houseno=0;
        strcpy(house.locality,"NULL");
        strcpy(house.city,"NULL");
        dcheckin.dd=0;
        dcheckin.mm=0;
        dcheckin.yy=0;
        dcheckout.dd=0;
        dcheckout.mm=0;
        dcheckout.yy=0;


    }
    void GETDATA();
    void PUTDATA();
    date dcheckin;
    date dcheckout;
    int retid()
    {
        return id;
    }
    char *retname()
    {
        return name;
    }
}s;
 void DISPLAYALL();
 void VACSER();
    void STATUS(int);
    void CHECKIN(int);
    void CHECKOUT(int);
    void EXCHANGE(int,int);
    void SEARCH(int);
    void SEARCH(char *);
    void MODIFY(int);
    void DELFILE(int val);
    void WRITEFILE();
    //void DISPLAY(int);//
class hotel
{   public:
    int id;
    Service scondition;
    Vacancy vcondition;
    hotel()
    {
        id=0;
        vcondition=Vacant;
        scondition=Done;
    }

}set[10];
void MENU();
void MENU()
{
    int choice,a,b,n,i;
Y:  system("cls");
    cout<<"\t \t \t Welcome to THE INCEPTION HOTEL \n";
    cout<<"1.Book a room\n";
    cout<<"2.Check info of a room\n";
    cout<<"3.Check in\n";
    cout<<"4.Check out\n";
    cout<<"5.Service requests and Vacancies\n";
    cout<<"6.Display all \n";
    cout<<"7.Exchange\n";
    cout<<"8.Search by name\n";
    cout<<"9.Search by customer id\n";
    cout<<"10.Modify\n";
    cout<<"11.Exit \n";
    cout<<"Enter choice \n";
    cin>>choice;
    switch(choice)
    {
    case 1:
    WRITEFILE();
    break;

	case 2:
	cout<<"Enter the room no \n";
    cin>>i;
	STATUS(i);
	break;

	case 3:
	cout<<"Enter room no\n";
    cin>>i;
	CHECKIN(i);
	break;

	case 4:
	cout<<"Enter room no\n";
    cin>>i;
	CHECKOUT(i);
	break;

	case 5:
	VACSER();
	break;

	case 6:
	DISPLAYALL();
	break;

	case 7:
	cout<<"Enter the room no you want to exchange\n ";
	cin>>a;
	cout<<"Enter the room no you want to exchange with\n";
	cin>>b;
	EXCHANGE(a,b);
	break;

	case 8:
	char sname[20];
	cout<<"Enter name you want to search for?\n";
	cin.getline(sname,sizeof(sname));
	cin.get(ch);
	SEARCH(sname);
	break;

	case 9:
	int id;
	cout<<"Enter id you want to search for?\n";
	cin>>id;
	SEARCH(id);

	case 10:
	cout<<"Enter customer id whose info is to be modified\n";
	cin>>n;
	MODIFY(n);
	break;

	case 11:
	exit(0);
	break;

	default:
	break;

    }
    goto Y;
}

void WRITEFILE()
{
    f.open("hotel.dat",ios::binary|ios::app);
    s.GETDATA();
    f.write((char *)&s,sizeof(s));
    f.close();
}

void ROOM::GETDATA()
{
    cout<<"Enter NAME OF GUEST \n ";
    cin.getline(name,sizeof(name));
    cin.get(ch);
    cout<<"Enter CUSTOMER ID \n";
    cin>>id;
    cout<<"Enter ROOM NO \n";
    cin>>no;
    cout<<"Enter NO OF MEMBERS  \n";
    cin>>members;
    cout<<"Enter DATE OF CHECKIN \n";
    cin>>dcheckin.dd;
    cout<<"/";
    cin>>dcheckin.mm;
    cout<<"/";
    cin>>dcheckin.yy;
    cout<<"\n";
    cout<<"Enter DATE OF CHECKOUT \n ";
     cin>>dcheckout.dd;
    cout<<"/";
    cin>>dcheckout.mm;
    cout<<"/";
    cin>>dcheckout.yy;
    cout<<"\n";
     cout<<"Enter ADDRESS \n";
     cin>>house.houseno;
     cin.getline(house.locality,sizeof(house.locality));
     cin.get(ch);
     cin.getline (house.city,sizeof(house.city));
     cin.get(ch);
}

void ROOM::PUTDATA()
{
    cout<<"Name of GUEST - "<<name<<"\n";
    cout<<"CUSTOMER ID - "<<id<<"\n";
    cout<<"ROOM NO - "<<no<<"\n";
    cout<<"No of MEMBERS - "<<members<<"\n";
    cout<<"Date of CHECKIN - "<<dcheckin.dd<<"/"<<dcheckin.mm<<"/"<<dcheckin.yy<<"\n";
    cout<<"Date of CHECKOUT - "<<dcheckout.dd<<"/"<<dcheckout.mm<<"/"<<dcheckout.yy<<"\n";
    cout<<"ADDRESS - "<<house.houseno<<","<<house.locality<<","<<house.city<<"\n";
}
void DISPLAYALL()
{   int m;
    f.open("hotel.dat",ios::binary|ios::in);
    while(f.read((char *)&s,sizeof(s)))
    s.PUTDATA();
    f.close();
    cout<<"Press 0  to go back to MAIN MENU\n";
    cin>>m;
    if(m==0)
    {
	MENU();
    }
}
void STATUS(int i)
{
    int m;
    if(set[i].vcondition==Vacant)
    {   cout<<"ROOM - "<<i<<"\n";
	cout<<"\n This room is vacant. You can check into this room\n";
    }
    else if(set[i].vcondition==NotVacant)
    {
	cout<<"\nThis room is not vacant\n";
    set[i].id=m;
    SEARCH(m);
    }
    cout<<"Press 0  to go back to MAIN MENU\n";
    cin>>m;
    if(m==0)
    {
	MENU();
    }
}
void CHECKIN(int i)
{
    int m;
    cout<<"Enter customer id\n";
    cin>>m;
    set[i].vcondition=NotVacant;
    set[i].scondition=Done;
    set[i].id=m;
    cout<<"Press 0  to go back to MAIN MENU\n";
    cin>>m;
    if(m==0)
    {
	MENU();
    }
}
void CHECKOUT(int i)
{   int m;
    set[i].vcondition=Vacant;
    set[i].scondition=Pending;
    m=set[i].id;
    set[i].id=0;
    DELFILE(m);
    cout<<"Press 0  to go back to MAIN MENU\n";
    cin>>m;
    if(m==0)
    {
	MENU();
    }

}

void DELFILE(int val)
{
    fstream f1,f2;
    f1.open("hotel.dat",ios::binary|ios::in);
    f2.open("Temp.dat",ios::binary|ios::out);
    while(f1.read((char *)&s,sizeof(s)))
    {
        if(s.retid()!=val)
        f2.write((char *)&s,sizeof(s));

    }
    f1.close();
    f2.close();
    remove("hotel.dat");
    rename("Temp.dat","hotel.dat");
}
void VACSER()
{   int i,m;
	for(i=0;i<10;i++)
    {
       if(set[i].vcondition==Vacant&&set[i].scondition==Pending)
       {cout<<"ROOM NO - "<<i<<"\n";
       cout<<"VACANCY - VACANT\n";
       cout<<"SERVICE - PENDING\n\n";
       }
       else if(set[i].vcondition==Vacant&&set[i].scondition==Done)
       {cout<<"ROOM NO - "<<i<<"\n";
       cout<<"VACANCY - VACANT\n";
       cout<<"SERVICE - DONE\n\n";}
       else if(set[i].vcondition==NotVacant&&set[i].scondition==Pending)
        {cout<<"ROOM NO - "<<i<<"\n";
       cout<<"VACANCY - NOT VACANT\n";
       cout<<"SERVICE - PENDING\n\n";}
        else if(set[i].vcondition==NotVacant&&set[i].scondition==Done)
       {cout<<"ROOM NO - "<<i<<"\n";
       cout<<"VACANCY - NOT VACANT\n";
       cout<<"SERVICE - DONE\n\n";}
    }
    cout<<"Press 0  to go back to MAIN MENU\n";
    cin>>m;
    if(m==0)
    {
	MENU();
    }
}
void EXCHANGE(int m,int n)
{   int c;
    hotel temp;
    temp=set[m];
    set[m]=set[n];
    set[n]=temp;
    cout<<"Press 0  to go back to MAIN MENU\n";
    cin>>c;
    if(c==0)
    {
	MENU();
    }
}
int main()
{
    
    MENU();
    getch();
    return 0;
}
void SEARCH(int val)
{
    int m;
    f.open("hotel.dat",ios::binary|ios::in);
    int flag=0;
    while(f.read((char *)&s,sizeof(ROOM)))
    {
        if(s.retid()==val)
        {
            cout<<"Found\n";
            flag=1;
            s.PUTDATA();
            break;

        }
    }
    f.close();
    {
        if(flag==0)
        {
            cout<<"Record not found\n";
        }
    }
    cout<<"Press 0 to go back to MAIN MENU\n";
    cin>>m;
    if(m==0)
    {
	MENU();
    }
}

void SEARCH(char *m)
{

    int c,flag=0;
    f.open("hotel.dat",ios::binary|ios::in);
    while(f.read((char *)&s,sizeof(s)))
    {
        if(strcmp(m,s.retname())==0)
        {
            flag=1;
            cout<<"Record found\n";
            s.PUTDATA();
        }
        f.close();
        if(flag==0)
        {
            cout<<"Record not found\n";
        }
    }
    cout<<"Press 0 to go back to MAIN MENU\n";
    cin>>c;
    if(c==0)
    {
	MENU();
    }
}
void MODIFY(int a)
{   ROOM s;
    int m;

    f.open("hotel.dat",ios::binary|ios::in|ios::out);
    while(f.read((char *)&s,sizeof(s)))
    {
        if(a==s.retid())
        {
            f.seekg(-sizeof(s),ios::cur);
            cout<<"Enter new details\n";
            s.GETDATA();
            f.write((char *)&s,sizeof(s));
        }
    f.close();
    }
    cout<<"Press 0  to go back to MAIN MENU\n";
	cin>>m;
	if(m==0)
    {
	MENU();
    }
}
    

[N36fSL3A]

Why are you using Turbo C++ in the first place? Go get MinGW or VC++.

Seriously, I'd rather have Dev C++

(It's a good sign its outdated when you see a standard library header with '.h' after it)

[Computergeek01]

I don't understand this error, are you trying to link to your executable? Don't do that. Also you should get a better IDE, the fact that this one assumes you're using the std namespace without your explicitly declaring it is another bad sign.

@ Fred: The .h extension just means that the header is meant for an application written in C instead of C++. It indicates that it does not use any features that are part of the C++ standard but not the C standard.

[ne555]

@Computergeek01: iostream.h and fstream.h do not exist in the C standard

[Computergeek01]

That's handy to point out to the OP, but I thought I worded that carefully enough. I said that they do not use any features that are part of the C++ but not the C standard, not that that the files themselves are part of the C standard. The example I had in mind was the WinAPI, which use '.h' to indicate what files are compatible with C.

[ne555]

> it does not use any features that are part of the C++ standard but not the C standard.
I have no idea how to read that.
The `but not the C standard' confuses me.

I guess that it means `it is compatible with C'
Which is false, as cout and cin use operator overloading

So, ¿do you mind to reword it?