I am compiling my two .cpp files that are linked with header file. i am getting the error
~/...>g++ -o test.exe diamondtest.o main.o
Undefined first referenced
symbol in file
Diamond::Diamond(int) main.o
Diamond::Diamond(int, char) main.o
ld: fatal: Symbol referencing errors. No output written to test.exe
collect2: ld returned 1 exit status
It seems to be in the header file i think. Here are my codes
------diamond.h------
#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
class Diamond
{
public:
Diamond();
Diamond(int size);
Diamond(int size, char border);
Diamond(int size, char border, char fill);
//functions
double Area();
int Perimeter() const;
int GetSize() const;
void Grow();
void Shrink();
void SetBorder(char border);
void SetFill(char fill);
void Draw();
void Summary();
private:
int size; //if less than 1, size=1. if greater than 39, size=39
char fill; // fill is '*'
char border; // border is '#'
};---main.o----
#include <iostream>
#include <iomanip>
#include "diamond.h"
using namespace std;
int main()
{
// set decimal outputs to 2 decimal places
cout << setiosflags( ios::fixed | ios::showpoint )
<< setprecision( 2 );
// create some Diamonds
Diamond d1( -5 ), d2( 7, '^' ), d3( 12, 'X', 'O' ), d4( 50 , '$' , 'o');
// display original Diamonds
cout << "d1 has size = " << d1.GetSize() << " units.\n";
d1.Draw();
cout << "\nd2 has size = " << d2.GetSize() << " units.\n";
d2.Draw();
cout << "\nd3 has size = " << d3.GetSize() << " units.\n";
d3.Draw();
cout << "\nd4 has size = " << d4.GetSize() << " units.\n";
d4.Draw();
cout << '\n';
d1.Shrink(); // demonstrate shrink
d2.Shrink();
d3.Grow(); // and grow
d4.Grow();
cout << "d1 now has size = " << d1.GetSize() << " units.\n";
cout << "d2 now has size = " << d2.GetSize() << " units.\n";
cout << "d3 now has size = " << d3.GetSize() << " units.\n";
cout << "d4 now has size = " << d4.GetSize() << " units.\n";
// demonstrate perimeter
cout << "d2 has perimeter = " << d2.Perimeter() << " units.\n";
cout << "d3 has perimeter = " << d3.Perimeter() << " units.\n";
// and area
cout << "d2 has area = " << d2.Area() << " square units.\n\n";
cout << "d3 has area = " << d3.Area() << " square units.\n\n";
d1.Draw();
d1.Grow(); // show that fill character
cout << "d1 grows:\n"; // appears only when size
d1.Draw(); // is at least 3
d1.Grow();
cout << "... and grows:\n";
d1.Draw();
cout << '\n';
d1 = d2; // demonstrate the default overload of the
// assignment operator
cout << "d1 now has size = " << d1.GetSize() << " units.\n";
d1.Draw();
// demonstrate the changing of border and fill characters
d2.SetBorder('@');
d2.SetFill('-');
cout << "d2 now looks like:\n";
d2.Draw();
cout << '\n';
d2.SetBorder('\n'); // illegal border
d2.SetFill('\a'); // illegal fill
cout << "d2 now looks like:\n";
d2.Draw();
cout << '\n';
cout << "\nHere is a summary on d3:\n"; // demonstrate summary
d3.Summary();
return 0;
}-----Diamond.o---------
#include "diamond.h"
// definition of Member Functions for class Diamond
Diamond::Diamond(int side, char border = '#', char fill = '*')
{
if (size < 1) // if sideLength is less than 1
{
size = 1;
}
else if (size > 39) // if sideLength is greater than 39
{
size = 39;
}
SetBorder(border); // calls SetBorder function
SetFill(fill); // calls SetFill function
}
int Diamond::GetSize() const
{
return size; // returns length of a side
}
int Diamond::Perimeter() const
{
return (size * 4); // returns perimeter length
}
double Diamond::Area()
{
double area = 0;
double sideLength = 0;
sideLength = size; // creates a copy of size
// find area of the diamond
area = sqrt((sideLength * sideLength) - ((sideLength / 2) * (sideLength / 2)));
area = 2 * (area * (sideLength / 2));
return area;
}
void Diamond::Grow()
{
size++; // increases sideLength by 1
if (size > 39) // checks if sideLength is greater than 39
size++; // increases sideLength by 1
if (size > 39) // checks if sideLength is greater than 39
{
size = 39;
}
}
void Diamond::Shrink()
{
size--; // decreases sideLength by 1
if (size < 1) // checks if sideLength is less than 1
{
size = 1;
}
}
void Diamond::SetBorder(char border2)
{
// checks if borderChar is not in range
if ((border < 33) || (border > 126))
{
border = '#';
}
}
void Diamond::SetFill(char fill2)
{
// checks if fillChar is not in range
if ((fill < 33) || (fill> 126))
{
fill = '*';
}
}
void Diamond::Draw()
{
int x, y; // declare x and y as integers
// prints top part of the diamond
for (x = 1; x <= size; x++)
{
for (y = 1; y <= size - x; y++)
{
cout << " ";
}
cout << border;
}
cout << border;
if (x > 2)
{
for (y = 1; y <= x - 2; y++)
{
cout << " " << fill;
}
cout << " " << border;
}
else if (x == 2)
{
cout << " " << border;
}
cout << "\n";
}
// prints bottom part of the diamond
for (x = size - 1; x >= 1; x--)
{
for (y = 1; y <= size - x; y++)
{
cout << " ";
}
cout << border;
if (x > 2)
{
for (y = 1; y <= x - 2; y++)
{
cout << " " << fill;
}
cout << " " << border;
}
else if (x == 2)
{
cout << " " << border;
}
cout << "\n";
}
}
void Diamond::Summary()
{
// prints size of the diamonds side
cout << "Size of diamond's side = " << size << " units.\n";
cout << "Size of diamond's side = " << size << " units.\n";
// prints the perimeter
cout << "Perimeter of diamond = " << Perimeter() << " units.\n";
// returns area with 2 decimal integer
cout << "Area of diamond = ";
cout << setprecision(2) << setiosflags(ios::fixed) << Area();
cout << " units.\n";
// Draws the actual diamond
cout << "Diamond looks like:\n";
Draw();
}