Trying to create a generic graphing tool

Hello everyone,

So I'm trying to write a couple of functions & classes that should allow me to create ascii graphs of functions that the user inputs.

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#include <string>
#include <iostream>
#include <algorithm>
#include <vector>
#define NEWLINE '\n'
#define TAB '\t'
#define VTAB '\v'
#define BEEP '\a'
#define BACK '\b'
using namespace std;

enum plotpoint { zero, one, two, three, four, five, six, seven, eight, nine, dash, vertbar, ppoint, space};
enum reltype {constant, linear, quadratic, cubic, quartic};

void Output_Plot_Point(plotpoint pp);

plotpoint Assign_PlotPoint_by_int(int c);

double Input_double(string prompt);
string Input_string(string prompt);

int Round_double_to_int (double in);

bool Compare_string(string i, string comp);

void ExitCall();

class DataPlot
{	public:
	vector<plotpoint [80]> plot;
	DataPlot(void);
	DataPlot(int data [80] [100], int h);
	~DataPlot(void);						
	void DisplayPlot();
											};

class CFunction
{	public:
	int datadesc [80] [100];
	reltype function_type;
	double a, b, c, d, e;						
	CFunction(void);
	CFunction(double ai, double bi, double ei);								// f(x) = a(x-b) + e			Overloaded Linear Constructor
	CFunction(double ai, double bi, double ci, double ei);					// f(x) = a(x-b)(x-c) + e		Overloaded Quadratic Constructor
	CFunction(double ai, double bi, double ci, double di, double ei);		// f(x) = a(x-b)(x-c)(x-d) + e	Overloaded Cubic Constructor
	void PlotFunction();
	int get_plot_cell(int hofs, int vofs);
	~CFunction(void);
	
					};

void User_cfunction();
void User_init_cfunction(CFunction * pFunction);


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#include "FRepo.h"
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <cstdlib>
#include <windows.h>
#include <mmsystem.h>
#define NEWLINE '\n'
#define TAB '\t'
#define VTAB '\v'
#define BEEP '\a'
#define BACK '\b'
using namespace std;

double Input_double(string prompt)
{	while(true)
	{	cout << prompt;
		double data;
		cin >> data;
		if (!cin.fail())
			{	return data;
				cout << NEWLINE << NEWLINE;		}
			cin.clear();
			cin.ignore();
			cout << NEWLINE << NEWLINE;		}	}

string Input_string(string prompt)
{	while(true)
	{	cout << prompt;
		string data;
		getline (std::cin,data);
		if (!cin.fail())
			{	return data;
				cout << NEWLINE << NEWLINE;		}
			cin.clear();
			cin.ignore();
			cout << NEWLINE << NEWLINE;		}	}

int Round_double_to_int (double in)
{	int d;
	d = in;
	in = in - d;
	if (in == 0.5)
	{	return d;	}
	else if (in > 0.5)
	{	d++;
		return d;	}
	else if (in < 0.5)
	{	return d;	}
							}


bool Compare_string(string i, string comp)
{	transform (i.begin (), i.end (), i.begin (), toupper);	
	if (i == comp)
	{	return true;	}
	else if (i != comp)
	{	return false;	}		}


void ExitCall()
{	exit(0);	} 

plotpoint Assign_PlotPoint_by_int(int c)
{	if (c == 0)
	{	return zero;	}
	if (c == 1)
	{	return one;	}
	if (c == 2)
	{	return two;	}
	if (c == 3)
	{	return three;	}
	if (c == 4)
	{	return four;	}
	if (c == 5)
	{	return zero;	}
	if (c == 6)
	{	return six;	}
	if (c == 7)
	{	return seven;	}
	if (c == 8)
	{	return eight;	}
	if (c == 9)
	{	return nine;	}

	if (c == 10)
	{	return dash;	}
	if (c == 11)
	{	return vertbar;	}
	if (c == 12)
	{	return ppoint;	}
	if (c == 13)
	{	return space;	}
								}

void Output_Plot_Point(plotpoint pp)
{	if (pp == zero)
        {       cout << "0";	}
	if (pp == one)
	{	cout << "1";	}
	if (pp == two)
	{	cout << "2";	}
	if (pp == three)
	{	cout << "3";	}
	if (pp == four)
	{	cout << "4";	}
	if (pp == five)
	{	cout << "5";	}
	if (pp == six)
	{	cout << "6";	}
	if (pp == seven)
	{	cout << "7";	}
	if (pp == eight)
	{	cout << "8";	}
	if (pp == nine)
	{	cout << "9";	}

	if (pp == dash)
	{	cout << "-";	}
	if (pp == vertbar)
	{	cout << "|";	}
	if (pp == ppoint)
	{	cout << "*";	}
	if (pp == space)
	{	cout << " ";	}		}

DataPlot::DataPlot(void)
{					}

DataPlot::DataPlot(int data [80] [100], int h)
{	int height = 0;
	plotpoint copyline [80];
		while (true)
		{	int p = 0;
			int c = data [p] [height];
			copyline [p] = Assign_PlotPoint_by_int(c);
			p++;
			if (p == 79)
			{	plot.emplace(plot.begin(), copyline);
				p = 0;
				height++;
				if (height == h)
				{	break;	}	}	}	}

void DataPlot::DisplayPlot()
{	vector<plotpoint [80]>::iterator it;
	for (it = (plot.end()-1); it != (plot.begin()-1); --it)
	{	while (true)
		{	int p_out = 0;
			Output_Plot_Point((*it) [p_out]);
			p_out++;
			if (p_out == 79)
			{	cout << NEWLINE;		}	}	}	}


DataPlot::~DataPlot(void)
{					}

void User_cfunction()
{	CFunction * pFx;
	User_init_cfunction(pFx);
	string i;
	i = Input_string("Plot Function? ");
	transform (i.begin (), i.end (), i.begin (), toupper);
	if ((i == "YES")||(i == "Y"))
	{	cout << NEWLINE << NEWLINE;
		pFx->PlotFunction();
		DataPlot Output (pFx->datadesc, 80);
		Output.DisplayPlot();		
		delete pFx;				}
	else
	{	cout << "deleting plot." << endl;
		delete pFx;		}	}

void User_init_cfunction(CFunction * pFunction)
{	string i;
	reltype ftype;
	while(true)
	{	i = Input_string("Please input function type: ");
		transform (i.begin (), i.end (), i.begin (), toupper);
		if ((i == "LINEAR")||(i == "L"))
		{	ftype = linear;	
			double ai, bi, ei;
			ai = Input_double("a value: ");
			bi = Input_double("b value: ");
			ei = Input_double("e value: ");
			pFunction = new CFunction(ai, bi, ei);
			break;		}
		else if ((i == "QUADRATIC")||(i == "Q"))
		{	ftype = quadratic;	
			double ai, bi, ci, ei;
			ai = Input_double("a value: ");
			bi = Input_double("b value: ");
			ci = Input_double("c value: ");
			ei = Input_double("e value: ");			
			pFunction = new CFunction(ai, bi, ci, ei);
			break;		}
		else if ((i == "CUBIC")||(i == "C"))
		{	ftype = quadratic;
			double ai, bi, ci, di, ei;
			ai = Input_double("a value: ");
			bi = Input_double("b value: ");
			ci = Input_double("c value: ");
			di = Input_double("d value: ");
			ei = Input_double("e value: ");
			pFunction = new CFunction(ai, bi, ci, di, ei);
			break;		}	}	}


CFunction::CFunction(double ai, double bi, double ei)
{		function_type = linear;
		a = ai;
		b = bi;
		c = 0;
		d = 0;
		e = ei;    }


CFunction::CFunction(double ai, double bi, double ci, double ei)
{		function_type = quadratic;
		a = ai;
		b = bi;
		c = ci;
		d = 0;
		e = ei;     }



CFunction::CFunction(double ai, double bi, double ci, double di, double ei)
{		function_type = cubic;
		a = ai;
		b = bi;
		c = ci;
		d = di;
		e = ei;      }
int CFunction::get_plot_cell(int hofs, int vofs)				// a-horizontal ofs (right) b-vertical ofs (down)
{	double xvar, fxvar;	
	int check;
	if (function_type = linear)									// f(x) = a(x-b) + e			Overloaded Linear Constructor
	{	xvar = hofs;
		fxvar = ((a*(xvar - b))+e);
		check = Round_double_to_int (fxvar);
		if (check == vofs)
		{	return 12;		}
		else
		{	return 13;		}    }
	else if (function_type = quadratic)							// f(x) = a(x-b)(x-c) + e		Overloaded Quadratic Constructor
	{	xvar = hofs;
		fxvar = ((a*(xvar - b)*(xvar - c))+e);
		check = Round_double_to_int (fxvar);
		if (check == vofs)
		{	return 12;		}
		else
		{	return 13;		}
								}
	else if (function_type = cubic)								// f(x) = a(x-b)(x-c)(x-d) + e	Overloaded Cubic Constructor
	{	xvar = hofs;
		fxvar = ((a*(xvar - b)*(xvar - c)*(xvar - d))+e);
		check = Round_double_to_int (fxvar);
		if (check == vofs)
		{	return 12;		}
		else
		{	return 13;		}
								}	}
void CFunction::PlotFunction()
{	int hofs, vofs;
	vofs = 0;
	while (true)
	{	hofs = 0;
		datadesc [hofs] [vofs] = get_plot_cell(hofs, vofs);
		hofs++;
			if (hofs == 79)
			{	hofs = 0;
				vofs++;
				if (vofs == 99)
				{	break;	}	}	}	}


Everything appears okay until I try to compile, when I get this:
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1>          C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\xmemory(280) : see reference to function template instantiation 'void std::allocator<_Ty>::construct<plotpoint(&)[80]>(plotpoint (*)[80],_Other)' being compiled
1>          with
1>          [
1>              _Ty=plotpoint [80],
1>              _Other=plotpoint (&)[80]
1>          ]


I'm not sure what that means, but it sounds a lot like some issue with what I'm passing to the vector class as its content. Can anyone clarify what I'm doing wrong here?
Hi there,

In your .h: vector<plotpoint [80]> plot;

You can't store arrays in STL containers. You could use std::array if your compiler supports it:

vector< std::array<plotpoint, 80>> plot;

Don't forget to alter your .cpp file as well:
Line 147: vector<std::array<plotpoint, 80>>::iterator it;

Hope that helps.

All the best,
NwN
Last edited on
Tried it...

And no luck. I'm using MSVC++ 2010, so I guess my compiler doesnt support it?

Any ideas on how else I could handle the graph lines? Maybe I'll just leave the size as 80x100 standard...
MSVC 2010 does support std::array<>

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#include <array>

// etc

std::array<plotpoint, 80> test;


Andy
Hi,

Just to clarify Andywestken's post, did you #include <array> ?

All the best,
NwN
Ahh, yes I did, but no luck anyways. I decided to make the plot size fixed at 80x100, and made quite a few other changes under the hood, but I cant get it to work yet. Im going to do a bit of a tear down & rebuild on this to fix the spaghetti code monster that I've created. If all goes well, I'll post the results here later.
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