Cannot call function from main using custom static library

[Nitrosolid]

I cannot run the Display() function it gives me a
Unresolved external symbol_public:void _thiscall"

Severity Code Description Project File Line Suppression State
Error LNK1120 2 unresolved externals Project1 C:\Users\Ultimax\source\repos\Project1\Debug\Project1.exe 1
Error LNK2019 unresolved external symbol "public: void __thiscall Album::Display(void)" (?Display@Album@@QAEXXZ) referenced in function _main Project1 C:\Users\Ultimax\source\repos\Project1\Project1\Source.obj 1
Error LNK2001 unresolved external symbol "class Song * mysong" (?mysong@@3PAVSong@@A) Project1 C:\Users\Ultimax\source\repos\Project1\Project1\staticlib1.lib(Album.obj) 1

I am pulling my hair over this everything seems to be in order. It detects the libraries i made in the main cpp file.

Album Code

#include <string>
#include <iostream>
#include <fstream>
#include "album.h"
#include "artist.h"
#include "song.h"
#include "time.h"


using namespace std;
Song mysong[];

Album::Album() {
	 mysong[5];
	Time theTime = Time(5,4);
	for (int i = 0; i < 0; i++) {
		mysong[i].setTime(theTime);
		mysong[i].setTitle("theTitle");
	}

}


void Album::setTitle(string q) {
	albumtitle = q;
}
string Album::getTitle() {
	return albumtitle;
}



//****************************************************
// Function: Read
//
// Purpose: Loads song data from a user specified file.
//        
//
//****************************************************
void Read(string file) {
	ifstream input(file, ios::out | ios::app);
}
//****************************************************
// Function: Write
//
// Purpose: Writes Data to a specified file.
//
//****************************************************
void Write(string filename) {
	ofstream input(filename, ios::out | ios::app);
}
//****************************************************
// Function: Display
//
// Purpose: Loads to screen.
//
//****************************************************
void Display() {
	//Display

	for (int i = 0; i < 0; i++) {
		
		cout << mysong[i].getTitle();
		
	}

}
//Set & Get Functions

Main

//****************************************************
// File: source.cpp
//
// Purpose: to get user input and call functions. 
//

//
// Compiler: Visual C++ 2013


#include <string>
#include <iostream>
#include <fstream>
#include "song.h"
#include "album.h"

int main() {
	//Variables.

	Album myalbum;

	myalbum.Display();

	system("pause");


}

Of course there are other libraries but the error seems to be only with album.Any help would be appreciated.

[Peter87]

When defining a member function outside the class definition you need to write the class name before the function name.

void Album::Display() {
	...
}

[Nitrosolid]

Thanks