I need help finishing this c++ program. I'm close to finishing but am having trouble getting all of the components to work together properly. Matrix.h should be finished with but I am unsure. I need help finishing Matrix.cpp and p1.cpp.If you could also please explain what I have done wrong and what you have done to fix, that would be extremely helpful. This is all done on a linux server and I need it all done to the specification of the project please. If you have any question please ask me.

These are some of the error i get when compiling:

In function `Matrix::Matrix(Matrix const&)':

Matrix.cpp:(.text+0x138): undefined reference to `Matrix::at(unsigned int, unsigned int) const'

/tmp/cc6aGECy.o: In function `Matrix::add(Matrix const&) const':

Matrix.cpp:(.text+0x28b): undefined reference to `Matrix::at(unsigned int, unsigned int) const'

/tmp/cc6aGECy.o: In function `Matrix::subtract(Matrix const&) const':

Matrix.cpp:(.text+0x419): undefined reference to `Matrix::at(unsigned int, unsigned int) const'

/tmp/cc6aGECy.o: In function `Matrix::multiply(Matrix const&) const':

Matrix.cpp:(.text+0x5db): undefined reference to `Matrix::at(unsigned int, unsigned int) const'

 

I know the multiply two matrices together needs to be fixed but I'm bot sure how.
#include "Matrix.h"

using namespace std;

  Matrix::Matrix(uint rows, uint cols) : rows(rows), colums(cols)
  {
    mat = new double*[rows];
    
    for(int i = 0; i < rows; i++)
    {
      mat[i] = new double[cols];   
    }
 
  }//Constructor
 
 
  Matrix::Matrix(const Matrix& m)
  {
    rows = m.rows;
    colums = m.colums;
    for(int i = 0;i < rows;i++)
    {
      for(int j = 0;j < colums;j++)
      {
      mat[i][j] = m.at(i,j);
      }
    }
  }//Copy Constructor
 
   Matrix::~Matrix()
  {
    delete [] mat;
  }//Deconstructor
 
  Matrix Matrix::add(double s) const
  {
    for(int i = 0;i < rows;i++)
    {
      for(int j = 0;j < colums;j++)
      {
        mat[i][j] += s;
      }
    }
    return *this;
  }//add scalar to the matrix
 
  Matrix Matrix::add(const Matrix & m) const
  {
    for(int i = 0;i < rows;i++)
    {
      for(int j = 0;j < colums;j++)
      {
        mat[i][j] += m.at(i,j);
      }
    }
    return *this;
  }//add this matrix and another
 
  Matrix Matrix::subtract(double s) const
  {
    for(int i = 0;i < rows;i++)
    {
      for(int j = 0;j < colums;j++)
      {
        mat[i][j] -= s;
      }
    }
    return *this;
  }//subtract scalar to the matrix
 
  Matrix Matrix::subtract(const Matrix & m) const
  {
    for(int i = 0;i < rows;i++)
    {
      for(int j = 0;j < colums;j++)
      {
        mat[i][j] -= m.at(i,j);
      }
    }
    return *this;
  }//subtract this matrix and another
 
  Matrix Matrix::multiply(double s) const
  {
    for(int i = 0;i < rows;i++)
    {
      for(int j = 0;j < colums;j++)
      {
        mat[i][j] *= s;
      }
    }
    return *this;
  }//multiply scalar to the matrix
 
  Matrix Matrix::multiply(const Matrix & m) const
  {
    int r = m.numRows();
    int c = m.numCols();
 
 
    Matrix temp(rows,c);
    
    for(int i = 0;i < rows;i++)
    {
      for(int j = 0;j < c;j++)
      {
        mat[i][j] *= m.at(i,j);
      }
    }
 
    
    return *this;
  }//multiply this matrix and another
 
  Matrix Matrix::divide(double s) const
  {
    for(int i = 0;i < rows;i++)
    {
      for(int j = 0;j < colums;j++)
      {
        mat[i][j] /= s;
      }
    }
    return *this;
  }//divide scalar to the matrix
  /*
  Matrix t() const
  {
    Matrix m;
    m.rows = colums;
    m.colums = rows;
    for(int i = 0;i < rows;i++)
    {
      for(int j = 0;j < colums;j++)
      {
        m.at(i,j) = mat[j][i];
      }
    
    }
  *this = m;
  return *this;
 
  }//transpose of this matrix
  */
 /*
  double & at(uint row, uint col)
  {
    return mat[row][col];
  }// get/set element at row,col
 
  const double & at (uint row, uint col) const
  {
    return mat[row][col];
  }// get element at row,col (when using a const object)
  */
  Matrix Matrix::operator +(int s)
  {
    return add(s);
  }
 
  Matrix Matrix::operator +(Matrix& s)
  {
    return add(s);
  }
 
  Matrix Matrix::operator -(int s)
  {

    return subtract(s);
  }


  Matrix Matrix::operator -(Matrix& s)
  {
    return subtract(s);
  }

  Matrix Matrix::operator *(int s)
  {

    return multiply(s);
  }


  Matrix Matrix::operator *(Matrix& s)
  {

  return multiply(s);
  }

  Matrix Matrix::operator /(int s)
  {
    return divide(s);
  }
 

I did't add the p1.cpp because I havn't done anything in it yet.

Attachments:

• 1510840656-p1 1.pdf