Solved

Link Error

Posted on 2004-04-04
8
337 Views
Last Modified: 2012-05-04
Hi,

I am getting the following link errors:

Linking...
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/Project2.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

Any ideas on this?

Ryan

0
Comment
Question by:RySk8er30
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 4
8 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 10753233
With the vast information you have given about the project type, all that remains is pointing you to http://support.microsoft.com/default.aspx?scid=kb;en-us;125750 ("PRB: Error LNK2001: '_WinMain@16': Unresolved External Symbol")
0
 

Author Comment

by:RySk8er30
ID: 10753322
I'm still confused.
0
 
LVL 86

Expert Comment

by:jkr
ID: 10753402
Me too. And, even worse, my crystal ball is on repair.
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:RySk8er30
ID: 10753414
I have a couple of files...here they are...

Bank.cpp

#include <conio.h> //Used for getche();
#include <windows.h> //Used for system("cls");
#include <fstream.h> //Used for infile and outfile
#include "Time.h"
#include "Account.h"
#include "Utility.h"
#include <iostream.h>

void main() {

      //Prototype Declarations
      void intro();

      //Local Variables
      Account currAcct;

      //Implementation
      intro();
      currAcct.verifyAcct();

}

void intro() { //Function which prints introduction page.

      /*

      Function Name: Intro
      Purpose: To display an introduction page
      Parameters:
            Input: none
            Input & Output: none
            Output: none
      Return Value: void
      Data Members Accessed: none
      Data Members Modified: none
      Non-local Variables Used: none
      Functions Called: none

      */

      //Local Variables
      Time t;
      
      lower();
      cout << CENTER << char(201) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(187) << endl;
      cout << CENTER << char(186) << "                                     " << char(186) << endl;
      cout << CENTER << char(186) << "        Welcome to Ryan's Bank       " << char(186) << endl;
      cout << CENTER << char(186) << "                                     " << char(186) << endl;
      cout << CENTER << char(186) << "           Do you trust me?          " << char(186) << endl;
      cout << CENTER << char(186) << "                                     " << char(186) << endl;
      cout << CENTER << char(200) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(205) << char(188) << endl;
      cout << CENTER << endl;
      cout << t.getDateAndTime();
      pause();

} //End intro Function

Utility.h...

#include <conio.h> //used for getche();
#include <windows.h>
#include "Constants.h" //used for CENTER, ClearScreen(),
#include <iostream.h> //used for cout;
#include <iomanip.h>
#include <stdlib.h> //used for atof()
#include <math.h> //used for atof()
#include <string.h> //used for strlen()

static void pause () {

      cout << CENTER << " " <<       "     Press any key to continue...    " << flush;
      getche();
      ClearScreen;

}

static void lower () {

      cout << "\n\n\n\n\n\n\n" << endl;

}

static int getPin () {

      int pinNum = 0;
      char pinChar[5];
      int i = 0;
      char temp;

      do {

            cout << flush;
            temp = getch();

            switch (temp) {

                  case toascii(48):
                  case toascii(49):
                  case toascii(50):
                  case toascii(51):
                  case toascii(52):
                  case toascii(53):
                  case toascii(54):
                  case toascii(55):
                  case toascii(56):
                  case toascii(57):
                        cout << "*";
                        pinChar[i] = temp;
                        ++i;
                        break;
                  case toascii(8):
                        if (i==0) {
                              cout << "";
                        } else {
                              cout << "\b \b";
                              --i;
                        }
                        break;
                  default:
                        MessageBeep(0xFFFFFFFF);
            }

      }while (i < 4);
      
      pinChar[i] = '\0';

      for (int n = 0; n < 4; n++) {
            
            pinNum = pinNum*10 + (toascii(pinChar[n]) - 48);

      }

      return pinNum;

}

static int getNumOnly () {

      int acctNum = 0;
      char acctChar[5];
      int i = 0;
      char temp;

      do {

            cout << flush;
            temp = getch();

            switch (temp) {

                  case toascii(48):
                  case toascii(49):
                  case toascii(50):
                  case toascii(51):
                  case toascii(52):
                  case toascii(53):
                  case toascii(54):
                  case toascii(55):
                  case toascii(56):
                  case toascii(57):
                        cout << temp;
                        acctChar[i] = temp;
                        ++i;
                        break;
                  case toascii(8):
                        if (i==0) {
                              cout << "";
                        } else {
                              cout << "\b \b";
                              --i;
                        }
                        break;
                  default:
                        MessageBeep(0xFFFFFFFF);
            }

      }while (i < 4);
      
      acctChar[i] = '\0';

      for (int n = 0; n < 4; n++) {
            
            acctNum = acctNum*10 + (toascii(acctChar[n]) - 48);

      }

      return acctNum;

}

static double getCurr () {

      double currNum = 0;
      char currChar[50];
      int i = 0;
      char temp;
      int dec = 0;
      bool exit = false;

      do {

            currChar[i];
            cout << flush;
            temp = getch();
      
                  switch (temp) {

                        case toascii(48):
                        case toascii(49):
                        case toascii(50):
                        case toascii(51):
                        case toascii(52):
                        case toascii(53):
                        case toascii(54):
                        case toascii(55):
                        case toascii(56):
                        case toascii(57):
                              cout << temp;
                              currChar[i] = temp;
                              ++i;
                              --dec;
                              break;
                        case toascii(8):
                              if (i==0) {
                                    cout << "";
                              } else {
                                    cout << "\b \b";
                                    --i;
                              }
                              --dec;
                              break;
                        case toascii(46):
                              cout << temp;
                              currChar[i] = temp;
                              ++i;
                              dec = 2;
                              break;
                        default:
                              MessageBeep(0xFFFFFFFF);
                  }

      }while ((dec != 0) && temp != toascii(13));

      currNum = atof(currChar);

      return currNum;

}

static void center (char string[]) {

      unsigned int len = strlen(string);
      int space = (80 - len)/2;

      for (int i = 0; i < space; i++) {
            cout << " ";
      }

      cout << string << endl;

}

Account.cpp

#include "Utility.h" //used for lower(), pause(), getPin(), center(), getNumOnly()
#include "Constants.h" //used for PER_STR, CENTER, ClearScreen();
#include <stdlib.h> //used for itoa()
#include <fstream.h> //used for ifstream();
#include <string.h>  //used for strcat();
#include <iostream.h>


class Account {

public:
      Account::Account(); //Constructor
      Account::Account(int acctNum, double balance, char *firstName, char *middleInital, char *lastName, int pin, char *acctFile); //Overloaded Constructor
      Account::~Account(); //Destructor
      Account::Account(Account &p); //Copy Constructor
      Account::verifyAcct();

private:
      int acctNum;
      double balance;
      char firstName[PER_STR];
      char middleInital[1];
      char lastName[PER_STR];
      int pin;
      char acctFile[PER_STR];
};

Account::Account() { //Constructor

      acctNum = 1234;
      balance = 0;
      firstName[PER_STR] = '\0';
      middleInital[1] = '\0';
      lastName[PER_STR] = '\0';
      pin = 1234;
      acctFile[PER_STR] = '\0';

} //End Constructor

Account::Account(int acctNum, double balance, char *firstName, char *middleInital, char *lastName, int pin, char *acctFile) { //Overlaoded Constructor

      acctNum = acctNum;
      balance = balance;
      firstName = firstName;
      middleInital = middleInital;
      lastName = lastName;
      pin = pin;
      acctFile = acctFile;

} //End Overloaded Constructor



Account::Account(Account &p) { //Copy Constructor

      p.acctNum = acctNum;
      p.balance = balance;
      p.firstName[PER_STR] = firstName[PER_STR];
      p.middleInital[1] = middleInital[1];
      p.lastName[PER_STR] = lastName[PER_STR];
      p.pin = pin;
      p.acctFile[PER_STR] = acctFile[PER_STR];

} //End Copy Constructor

Account::~Account() { //Destructor

} //End Destructor

Account::verifyAcct() {

      bool exit = false;

      do {

      lower();
      center("Please enter your four digit account number: ");
      cout << endl << setw(37) << " ";
      acctNum = getNumOnly();
      cout << endl << endl;
      center("Please enter your four digit pin number: ");
      cout << endl << setw(37) << " ";
      pin = getPin();

      _itoa(acctNum, acctFile, 10);

      strcat(acctFile, ".txt");

      ifstream infile;

      //Tries to open the file.  If it does not exist, it does not create one.
      infile.open(acctFile, ios::out|ios::nocreate);
      
      //If the account does not exist, prompt user to create one.
      
      if (!infile) {
            ClearScreen;
            lower();
            center("Invalid account...");
            cout << endl << endl;
            pause();
            ClearScreen;
      }

      infile >> acctNum;
      infile >> balance;
      infile >> lastName;
      infile >> firstName;

      //Closes the file
      infile.close();

      } while (!exit);


}

Constants.h

#define ClearScreen system("cls")
#define PER_STR 50
#define CENTER setw(22)

Time.h

class Time {
private:
      int year,
            month,
            day,
            dayOfWeek,
            hour24,
            hour12,
            minute,
            second;
      char timeCode[8];
      char ampm[3];
      char mos[10];
      char dOWeek[10];

public:
      // Constructors
      Time();
      Time(int year, int mos, int day, int hour, int min, int sec);
      Time(char * tCode);
      ~Time(); // Destructor
      void reset(); // to reset to current time
      char * getTimeCode();
      int getYear();
      int getMonthAsInt();
      char * getMonthAsString();
      int getDay();
      int getDayOfWeekAsInt();
      char * getDayOfWeekAsString();
      int getHour24();
      int getHour12();
      char * getAMPM();
      int getMinute();
      int getSecond();
      char * getDate();
      char * getTime();
      char * getDateAndTime();
};


Here are the errors:

Bank.obj : error LNK2001: unresolved external symbol "public: __thiscall Time::~Time(void)" (??1Time@@QAE@XZ)
Bank.obj : error LNK2001: unresolved external symbol "public: char * __thiscall Time::getDateAndTime(void)" (?getDateAndTime@Time@@QAEPADXZ)
Bank.obj : error LNK2001: unresolved external symbol "public: __thiscall Time::Time(void)" (??0Time@@QAE@XZ)
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/Project2.exe : fatal error LNK1120: 4 unresolved externals

Ryan
0
 
LVL 86

Accepted Solution

by:
jkr earned 125 total points
ID: 10753466
Well, the key is that you are using a console application and not a GUI - go to the project settings, pick the "Link" tab and see the text field at teh bottom. Locate '/subsystem:windows' nd make that read '/subsystem:console', this will fix the 'WinMain' problem. As for the 'Time' related errors - do you have a 'time.cpp' file and if so, did you add that to your project?
0
 

Author Comment

by:RySk8er30
ID: 10753500
Hi,

I have a time.h file, adn a time.obj file.  That is all I have been given.  I have added it to my project.

Ryan
0
 

Author Comment

by:RySk8er30
ID: 10753518
Hi,

It actually works now.  I must have choose a Windows Application instead of a Console Application.  Thank you for your help (except for the sarcasm).

Ryan
0
 
LVL 86

Expert Comment

by:jkr
ID: 10753983
Thank you!

> except for the sarcasm

Well, that IMHO was appropriate and hearty :o)
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Container Orchestration platforms empower organizations to scale their apps at an exceptional rate. This is the reason numerous innovation-driven companies are moving apps to an appropriated datacenter wide platform that empowers them to scale at a …
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question