C++ Fatal Error LNK1120: 1 unresolved externals

What is causing this error? I google'd it and first few solutions I found were that something was wrong with the library and the main function but both seem to be fine in my problem, I even retyped both! What could be causing this?

This might be helpful:

MSVCRTD.lib(crtexew.obj) : error LNK2019: unresolved external symbol WinMain@16 referenced in function __tmainCRTStartup

#include <iostream>
using namespace std;
int main()
{
    const double A = 15.0, 
                 B = 12.0, 
                 C = 9.0;
    double aTotal, bTotal, cTotal, total;
    int numSold;

    cout << "Enter The Number of Class A Tickets Sold: ";
    cin >> numSold;
    aTotal = numSold * A;

    cout << "Enter The Number of Class B Tickets Sold: ";
    cin >> numSold;
    bTotal = numSold * B;

    cout << "Enter The Number of Class C Tickets Sold: ";
    cin >> numSold;
    cTotal = numSold * C;
开发者_如何学Go
    total = aTotal + bTotal + cTotal;

    cout << "Income Generated" << endl;
    cout << "From Class A Seats $" << aTotal << endl;
    cout << "From Class B Seats $" << bTotal << endl;
    cout << "From Class C Seats $" << cTotal << endl;
    cout << "-----------------------" << endl;
    cout << "Total Income: " << total << endl;

    return 0;
}

From msdn

When you created the project, you made the wrong choice of application type. When asked whether your project was a console application or a windows application or a DLL or a static library, you made the wrong chose windows application (wrong choice).

Go back, start over again, go to File -> New -> Project -> Win32 Console Application -> name your app -> click next -> click application settings.

For the application type, make sure Console Application is selected (this step is the vital step).

The main for a windows application is called WinMain, for a DLL is called DllMain, for a .NET application is called Main(cli::array ^), and a static library doesn't have a main. Only in a console app is main called main

I incurred this error once.

It turns out I had named my program ProgramMame.ccp instead of ProgramName.cpp

easy to do ...

Hope this may help

My problem was int Main() instead of int main()

good luck

Well it seems that you are missing a reference to some library. I had the similar error solved it by adding a reference to the #pragma comment(lib, "windowscodecs.lib")

In my case, the argument type was different in the header file and .cpp file. In the header file the type was std::wstring and in the .cpp file it was LPCWSTR.

You must reference it. To do this, open the shortcut menu for the project in Solution Explorer, and then choose References. In the Property Pages dialog box, expand the Common Properties node, select Framework and References, and then choose the Add New Reference button.

I have faced this particular error when I didn't defined the main() function. Check if the main() function exists or check the name of the function letter by letter as Timothy described above or check if the file where the main function is located is included to your project.

In my particular case, this error error was happening because the file which I've added wasn't referenced at .vcproj file.

In my case I got this error when I had declared a function under 'public' access specifier. Issue got resolved when I declared that function as private.

I have encountered the same error. For me it turned out to be because I tried to implement an inline function in the .cpp file, instead of putting it in the header file, where the definition is. Therefore when I tried to include the header file and use the function, I got this error.

My case: I defined a prototype of the class de-constructor, but forgot to define the body.

class SomeClass {
    ~SomeClass(); //error
};

class SomeClass {
    ~SomeClass(){}; //no error
}

In my case I had forgotten to add the main() function altogether.