Computing coursework project

[Alexharvey]

Hi guys, basically for my computing coursework I am creating an application in C++ that displays guitar chords (as arrays). I cannot get my code to work and I think it is because each of my procedures, which are the levels of difficulty of each chord selected by the user, do not give a return value. I'm unsure of what to make it return, all I want to do is display the array the user selects. Here is a snippet of my code; the declarations, main and first procedure (easy). Can anybody suggest what I need to return?
Thankyou

 
#include <iostream>
#include <math.h>
#include <Windows.h>
using namespace std;

int difficulty;
int chord_type;
int chord_letter;
char chord[5][7];

int easy(char chord[5][7]);
int medium(char chord[5][7]); 
int hard(char chord[5][7]);
int main()
{
	cout << "Please choose a difficulty:" << endl << "1:Easy" << endl << "2:Medium" << endl << "3:Hard" << endl;
	cin >> difficulty;

	if (difficulty == 1)
	{
		easy(chord);	
	}
	if (difficulty == 2) 
	{
		medium(chord);
	}
				
	if (difficulty == 3)
	{
		hard(chord);
	}

Sleep(400000);
}

int easy()
{
	cout << "Please input Chord Type:" << endl << "Major:1" << endl << "Minor:2" << endl;
	cin >> chord_type;
	if (chord_type == 1)
	{
			cout << "Please enter the number of the chord letter you wish to select" << endl;
			cout << "A:1" << endl << "C:2" << endl << "D:3" << endl << "E:4" << endl << "G:5" << endl << "F:6" << endl;
			cin >> chord_letter;
			if (chord_letter == 1)
			{
				char A_Major_Open[5][7] = {		
					{' ', 'E', 'A', 'D', 'G', 'B', 'e' },
					{'0', 'X', '0', ' ', ' ', ' ', '0' },
					{'1', ' ', ' ', ' ', ' ', ' ', ' ' },
					{'2', ' ', ' ', '1', '2', '3', ' ' },
					{'3', ' ', ' ', ' ', ' ', ' ', ' ' } };		

					for (int string_letter = 0; string_letter < 5; ++string_letter)
					{

						for (int note = 0; note < 7; ++note)
						{
							cout << A_Major_Open[string_letter][note] << " ";
						}
						cout << endl;
					}
				
			}
			else
			{
				if (chord_letter == 2)
				{
					char C_Major_Open[5][7] = {
					{' ', 'E', 'A', 'D', 'G', 'B', 'e'},
					{'0', 'X', ' ', ' ', '0', ' ', '0' },
					{'1', ' ', ' ', ' ', ' ', '1', ' '},
					{'2', ' ', ' ', '2', ' ', ' ', ' ' },
					{'3', ' ', '3', ' ', ' ', ' ', ' ' } };			
					
					for (int string_letter = 0; string_letter < 5; ++string_letter)
					{
						for (int note = 0; note < 7; ++note)
						{
							cout << C_Major_Open[string_letter][note] << " ";
						}
						cout << endl;
					}
				}
				else
				{
					if (chord_letter == 3)
					{
						char D_Major_Open[5][7] = { 
							{' ', 'E', 'A', 'D', 'G', 'B', 'e' },
							{'0', 'X', 'X', '0', ' ', ' ', ' ' },
							{'1', ' ', ' ', ' ', ' ', ' ', ' ' },
							{'2', ' ', ' ', ' ', '1', ' ', '2' },
							{'3', ' ', ' ', ' ', ' ', '3', ' ' } };			

							for (int string_letter = 0; string_letter < 5; ++string_letter)
							{
								for (int note = 0; note < 7; ++note)
								{
									cout << D_Major_Open[string_letter][note] << " ";
								}
								cout << endl;
							}
					}
					else
					{
						if (chord_letter == 4)
						{
							char E_Major_Open[5][7] = { 
								{' ', 'E', 'A', 'D', 'G', 'B', 'e' },
								{'0', '0', ' ', ' ', ' ', '0', '0' },
								{'1', ' ', ' ', ' ', '1', ' ', ' ' },
								{'2', ' ', '2', '3', ' ', ' ', ' ' },
								{'3', ' ', ' ', ' ', ' ', ' ', ' ' } };		
								
								for (int string_letter = 0; string_letter < 5; ++string_letter)
								{
									for (int note = 0; note < 7; ++note)
									{
										cout << E_Major_Open[string_letter][note] << " ";
									}
									cout << endl;
								}
						}
						else
						{
							if (chord_letter == 5)
							{
								char G_Major_Open[5][7] = { 
									{' ', 'E', 'A', 'D', 'G', 'B', 'e' },
									{'0', ' ', ' ', '0', '0', '0', ' ' },
									{'1', ' ', ' ', ' ', ' ', ' ', ' ' },
									{'2', ' ', '1', ' ', ' ', ' ', ' ' },
									{'3', '2', ' ', ' ', ' ', ' ', '3' } };	
	
									for (int string_letter = 0; string_letter < 5; ++string_letter)
									{

										for (int note = 0; note < 7; ++note)

										{
											cout << G_Major_Open[string_letter][note] << " ";

										}
										cout << endl;
									}
							}
							else
							{
								if (chord_letter == 6)
								{
									char F_Major_Open[5][7] = {
										{' ', 'E', 'A', 'D', 'G', 'B', 'e' },
										{'0', 'X', 'X', ' ', ' ', ' ', ' ' },
										{'1', ' ', ' ', ' ', ' ', '1', '1' },
										{'2', ' ', ' ', ' ', '2', ' ', ' ' },
										{'3', ' ', ' ', '3', ' ', ' ', ' ' } };	

										for (int string_letter = 0; string_letter < 5; ++string_letter)
									{

										for (int note = 0; note < 7; ++note)

										{
											cout << F_Major_Open[string_letter][note] << " ";

										}
										cout << endl;
									}

								}
								else
								{
								cout << "Invalid number" << endl;
								}
							}
						}
					}
				}
			}
	}
	else 
	{
		if (chord_type == 2)
		{
			cout << "Please pick a chord letter" << endl << "A:1" << endl << "D:2" << endl << "E:3" << endl;
			cin >> chord_letter;
			if (chord_letter == 1)
			{ 
				char A_Minor_Open[5][7] = {
					{' ', 'E', 'A', 'D', 'G', 'B', 'e' },
					{'0', 'X', '0', ' ', ' ', ' ', '0' },
					{'1', ' ', ' ', ' ', ' ', '1', ' ' },
					{'2', ' ', ' ', '2', '3', ' ', ' ' },
					{'3', ' ', ' ', ' ', ' ', ' ', ' ' } };
					for (int string_letter = 0; string_letter < 5; ++string_letter)
					{
						for (int note = 0; note < 7; ++note)
						{
							cout << A_Minor_Open[string_letter][note] << " ";
						}
						cout << endl;
					}
			}
			else
			{
				if (chord_letter = 2)
				{
					char D_Minor_Open[5][7] = {
						{' ', 'E', 'A', 'D', 'G', 'B', 'e' },
						{'0', 'X', 'X', '0', ' ', ' ', ' ' },
						{'1', ' ', ' ', ' ', ' ', ' ', '1' },
						{'2', ' ', ' ', ' ', '2', ' ', ' ' },
						{'3', ' ', ' ', ' ', ' ', '3', ' ' } };
						for (int string_letter = 0; string_letter < 5; ++string_letter)
						{
							for (int note = 0; note < 7; ++ note)
							{
								cout << D_Minor_Open[string_letter][note] << " ";
							}
							cout << endl;
						} 
				}
				else 
				{
					if (chord_letter == 3)
					{
						char E_Minor_Open[5][7] = {
							{' ', 'E', 'A', 'D', 'G', 'B', 'e' },
							{'0', '0', ' ', ' ', ' ', ' ', ' ' },
							{'1', ' ', ' ', ' ', '1', ' ', ' ' },
							{'2', ' ', '2', '3', ' ', ' ', ' ' },
							{'30', ' ', ' ', ' ', ' ', ' ', ' ' } };
							for (int string_letter = 0; string_letter < 5; ++string_letter)
							{
								for (int note = 0; note < 7; ++ note)
								{
									cout << E_Minor_Open[string_letter][note] << " ";
								}
								cout << endl;
							}
					}
					else
					{
						cout << "Invalid number" << endl;
					}
				}
			}
		}
		else
		{
			cout << "Invalid number" << endl;
		}
	}
}