Error undefined refference to WinMain@16

[sam0fisher456]

Hey everyone..
when i try build and run this program the compiler gives me this error messege
fatal error : classes.h no such file or directory
OR
undefined reference to WinMain@16

main.cpp

#include <iostream>
#include <string>
#include <vector>
#include <cstdlib>
#include <windows.h>
#include "classes.h"//error line


using namespace std;



void fill_vector(vector<Manager>& funcVecMan,vector<Vehicle>& funcVecVeh,int signal){
 string name;
    if (signal == 1){
        cout << "\n Enter Names of Managers : ((Type 'done' To Exit))\n";
                cout << " Enter Name Of Manager " << " -> ";
                cin >> name;
                if (name == "done")signal = 0;
                if (signal == 1) {
                    Manager  addDel(name);
                    funcVecMan.push_back(addDel);
                }
                return fill_vector(funcVecMan,funcVecVeh,signal);
            }
........

classes.h

#include <string>
#include <iostream>



#ifndef CLASSES_H
#define CLASSES_H

using namespace std;

class Manager {
   string manager;
public:
    Manager();
    Manager(string manName);
    string getName();
};

class  Vehicle {
    string vehName;
    int vehOccupied;
    string manIncharge;
public :
        Vehicle();
        Vehicle (string name);
    void setManIncharge (string nameOfMan);
        int setOccSignal (int signal );
    string getVehName () ;
        string getManIncharge ();
    int getOccStatus();
};
#endif // FUNCTIONS_H

classes.cpp

#include <iostream>
#include <string>
#include "classes.h"

using namespace std;

//Manager Class Functoins .
Manager::Manager (): manager ("Unset"){}
Manager::Manager(string manName){  this->manager = manName; }
string Manager::getName(){return manager;}

//Vehicle Class Function .
Vehicle::Vehicle (): vehName ("Unset"),vehOccupied (0){}
Vehicle::Vehicle (string name) : vehName(name){};
void Vehicle::setManIncharge (string nameOfMan){
      this->manIncharge = nameOfMan ;  }
int Vehicle::setOccSignal (int signal){
      this->vehOccupied = signal ; }
int Vehicle::getOccStatus(){return vehOccupied ; }
string Vehicle::getVehName () {return vehName; }
string Vehicle::getManIncharge (){return manIncharge ; }

i need immediate help cuz this work is for an assignment .
thanks

[giblit]

You are either missing your main function

int main()
{
    ...
}

or you created a windows project instead of a c++ project.

As far as the missing header, is it saved in the same directory as the main.cpp?

[xenovia12]

You dont have your main function

[sam0fisher456]

no i have my main function but the code is long

int main () {
    system("color 30");
    vector<Manager> vecManName;
    vector<Vehicle> vecVehName;
    int choice;
    Manager mans;
    Vehicle vehs;
    cout << "\n Hello Boss This Your Manager System Program Choose What You Wish Of The Following :  Press Anykey To Procced \n";
    system("pause");
do{
    system("cls");
    cout << "\n Make A Choice : \n";
    cout << "\n## 1 ## Create Managers   ." <<" ## 2 ## Delete Managers .\n";
    cout << "## 3 ## Create Vehicle    ." <<" ## 4 ## Delete Vehicle  .\n";
    cout << "## 5 ## Display Grid      ." <<" ## 6 ## Assign-Unassign Managers .\n";
    cout <<"## 7 ## Show Whos In-Charge ."<< " ## 8 ## Exchange Vehicles .\n";
    cout << "## 9 ## Costmize Vehicles ." << " ## 10 ## Exit .\n Your Anawer Is --> ";
    cin >> choice;
    system("cls");

    switch (choice){
    case 1 :
       system("color 3");
       fill_vector(vecManName,vecVehName,choice);
       Sleep( 2000 );
       break;
    case 2 :
       system("color 12");
       delete_vector(vecManName,vecVehName,choice);
       Sleep( 2000 );
        break;
    case 3 :
        system("color 3");
        fill_vector(vecManName,vecVehName,choice);
        Sleep( 2000 );
        break;
    case 4 :
        system("color 12");
       delete_vector(vecManName,vecVehName,choice);
       Sleep( 2000 );
        break;
    case 5 :
        system("color 8");
        show_table(vecManName,vecVehName,choice);
        Sleep( 3000 );
        break;

[xenovia12]

O_O is that code really yours? i think your compiler does not have class header file

[sam0fisher456]

i'm using codeblocks 12.11

[xenovia12]

try search classes.h or classes in the windows start button