lab 3 start

Lab3/main.cpp

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+/**
+ * @file main.cpp
+ * @author Trevor Barnes (barnestr@msoe.edu)
+ * @brief 
+ * @version 1.0
+ * @date 2022-03-29
+ * 
+ * @copyright Copyright (c) 2022
+ * 
+ */
+#include<iostream>
+#include "matrix.h"
+using namespace std;
+
+int main()
+{
+	Matrix m1(2,2);
+	// add more tests
+	return 0;
+}

Lab3/makefile

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+# lab3 Makefile
+
+CC = g++
+CFLAGS = -c -MMD
+LFLAGS = 
+# Change w/ every new project
+SOURCES = main.cpp 
+OBJECTS = $(SOURCES:.cpp=.o)
+# Change w/ every new project
+EXECUTABLE = lab3
+
+all: $(EXECUTABLE) $(SOURCES)
+
+$(EXECUTABLE): $(OBJECTS)
+	$(CC) $(LFLAGS) -o $@ $(OBJECTS)
+
+-include *.d
+
+%.o:%.cpp
+	$(CC) $(CFLAGS) $<
+
+clean:
+	rm -f $(EXECUTABLE)
+	rm -f $(OBJECTS)
+	rm -f *.d

Lab3/matrix.cpp

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+/**
+ * @file matrix.cpp
+ * @author Trevor Barnes (barnestr@msoe.edu)
+ * @brief 
+ * @version 1.0
+ * @date 2022-03-29
+ * 
+ * @copyright Copyright (c) 2022
+ * 
+ */
+#include "matrix.h"
+#include <iomanip>
+using namespace std;
+
+// constructor
+Matrix::Matrix(unsigned int rows, unsigned int cols){
+	// Ensure size is valid
+	if(rows < 1 || cols < 1){ 
+		throw(out_of_range("rows and cols must be greater than 0"));
+	}
+	// Assign given row and col size to matrix
+	this->rows = rows;
+	this->cols = cols;
+	// Create the row pointer
+	this->the_matrix = new Row*[rows];
+	for(int i = 0; i < rows; i++){
+		// Assign the rows of the matrix to new memory
+		this->the_matrix[i] = new Row(cols);
+	}
+	// finish
+ }
+ 
+// Copy constructor
+Matrix::Matrix(const Matrix& from){
+	this->rows = from.rows;
+	this->cols = from.cols;
+	for(int i = 0; i < this->rows; i++){
+		
+	}
+}
+
+// Destructor
+Matrix::~Matrix(){
+	// finish
+}
+ 
+// Assignment operator
+Matrix& Matrix::operator=(const Matrix& rhs){
+	// finish
+	return *this;
+}	
+ 
+// Named Constructor 
+Matrix Matrix::identity(unsigned int size){
+	// Ensure size is valid
+	if(size < 1){ 
+		throw(out_of_range("rows and cols must be greater than 0"));
+	}
+	// Create square matrix
+	Matrix result(size, size);
+	for(int i = 0; i < size; i++){
+		// Fill each diagonal value with 1
+		result[i][i] = 1;
+	}
+	return result;
+	// finish
+}	
+		
+// Matrix addition
+Matrix Matrix::operator+(const Matrix& rhs) const{
+	Matrix result(this->rows, this->cols);
+	// finish
+	return result;
+}
+ 
+// Matrix multiplication 
+Matrix Matrix::operator*(const Matrix& rhs) const{
+	Matrix result(this->rows, rhs.cols);
+	// finish
+	return result;
+}
+ 
+// Scalar multiplication
+Matrix Matrix::operator*(const double scale) const{
+	Matrix result(this->rows, this->cols);
+	// finish
+	return result;
+}
+
+// Transpose of a Matrix
+Matrix Matrix::operator~() const{
+	Matrix result(this->cols, this->rows);
+	// finish
+	return result;
+}
+ 
+// Clear Matrix
+void Matrix::clear(){
+	// finish
+}
+  
+// Access Operators - non-const
+Row& Matrix::operator[](unsigned int row){
+	// Ensure the row is in range
+	if(row >= rows){
+		throw(out_of_range("Row is out of range"));
+	}
+	return *(the_matrix[row]);
+}
+ 
+// Access Operators - const
+const Row& Matrix::operator[](unsigned int row) const{
+	// Ensure the row is in range
+	if(row >= rows){
+		throw(out_of_range("Row is out of range"));
+	}
+	return *(the_matrix[row]);
+}
+ 
+// print to output stream
+void Matrix::out(std::ostream& os) const{
+	os << setprecision(4);
+	os << setw(10);	
+	// finish
+}
+
+// global insertion operator
+std::ostream& operator<<(std::ostream& os, const Matrix& rhs){
+	rhs.out(os);
+	return os;
+}	
+
+// global scalar multiplication
+Matrix operator*(const double scale, const Matrix& rhs){
+	return rhs*scale;
+}

Lab3/matrix.h

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+#ifndef matrix_h
+#define matrix_h
+ 
+#include <iostream> 
+#include "row.h"
+class Matrix
+{
+	public:
+		// No default (no argument) constructor.  It doesn't really make
+		// sense to have one as we cannot rely on a size.  This may trip
+		// us up later, but it will lead to a better implementation.
+		// matrix();
+ 
+		// Constructor - create Matrix and clear cells.  If rows or
+		// cols is < 1, throw an exception
+		Matrix(unsigned int rows, unsigned int cols);
+ 
+		// Copy constructor - make a new Matrix just like rhs
+		Matrix(const Matrix& from);
+ 
+		// Destructor.  Free allocated memory
+		~Matrix();
+ 
+		// Assignment operator - make this just like rhs.  Must function
+        	// correctly even if rhs is a different size than this.
+		Matrix& operator=(const Matrix& rhs);
+ 
+		// Named Constructor - produce a square identity matrix of the
+		// requested size.  Since we do not know how the object produced will
+		// be used, we pretty much have to return by value.  A size of 0 
+		// would not make sense and should throw an exception.
+		static Matrix identity(unsigned int size);
+ 
+		// Matrix addition - lhs and rhs must be same size otherwise
+		// an exception shall be thrown
+		Matrix operator+(const Matrix& rhs) const;
+ 
+		// Matrix multiplication - lhs and rhs must be compatible 
+		// otherwise an exception shall be thrown
+		Matrix operator*(const Matrix& rhs) const;
+ 
+		// Scalar multiplication.  Note, this function will support
+		// someMatrixObject * 5.0, but not 5.0 * someMatrixObject.
+		Matrix operator*(const double scale) const;
+
+		// Transpose of a Matrix - should always work, hence no exception
+		Matrix operator~() const;
+ 
+		// Clear Matrix to all members 0.0
+		void clear();
+  
+		// Access Operators - throw an exception if index out of range
+		Row& operator[](unsigned int row);
+ 
+		// const version of above - throws an exception if indices are out of
+		// range
+		const Row& operator[](unsigned int row) const;
+ 
+		// I/O - for convenience - this is intended to be called by the global
+		// << operator declared below.
+		void out(std::ostream& os) const;
+		
+	private:
+		// An array of Row pointers size "rows" that each point to a double array
+		// of size "cols"
+		Row** the_matrix;
+		unsigned int rows;
+		unsigned int cols;
+
+		/** routines **/
+
+		// add any "helper" routine here, such as routines to support
+		// matrix inversion
+
+};
+
+/** Some Related Global Functions **/
+ 
+// Overloaded global << with std::ostream as lhs, Matrix as rhs.  This method
+// should generate output compatible with an ostream which is commonly used
+// with console (cout) and files.  Something like:
+// [[ r0c0, r0c1, r0c2 ]
+//  [ r1c0, r1c1, r1c2 ]
+//  [ r0c0, r0c1, r0c2 ]]
+// would be appropriate.
+//
+// Since this is a global function, it does not have access to the private
+// data of a Matrix object.  So, it will need to use the public interface of
+// Matrix to do its job.  The method Matrix::out was added to Matrix
+// specifically for this purpose.  The other option would have been to make
+// it a "friend"
+std::ostream& operator<<(std::ostream& os, const Matrix& rhs);
+ 
+// We would normally have a corresponding >> operator, but
+// will defer that exercise that until a later assignment.
+
+
+// Scalar multiplication with a global function.  Note, this function will
+// support 5.0 * someMatrixObject, but not someMatrixObject * 5.0
+Matrix operator*(const double scale, const Matrix& rhs);
+
+#endif
+// Based on lab by Dr. Darrin Rothe ((c) 2015 Dr. Darrin Rothe)

Lab3/row.cpp

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+/**
+ * @file row.cpp
+ * @author Trevor Barnes (barnestr@msoe.edu)
+ * @brief Contains the main functionality for row matrices utilizing arrays of
+ * double values
+ * @version 1.0
+ * @date 2022-03-22
+ * 
+ * @copyright Copyright (c) 2022
+ * 
+ */
+#include <stdexcept>
+#include "row.h"
+using namespace std;
+
+// parameterized constructor
+Row::Row(unsigned int length){
+	// Set matrix length private variable to passed in length
+	this->length = length;
+	// Create new array in heap for row_data
+	this->row_data = new double[length];
+	// Clear all values in new array to 0
+	clear();
+}
+
+// copy constructor
+Row::Row(const Row& from){
+	// New row matrix gets length from previous matrix
+	this->length = from.length;
+	// Create new array in heap with new length
+	this->row_data = new double[this->length];
+	// Copy all row_data values over to new array
+	for(int i = 0; i < this->length; i++) {
+		this->row_data[i] = from[i];
+	}
+}
+
+// destructor
+Row::~Row(){
+	// Check for valid length then free the heap memory
+	if(length > 0 ) {
+		delete[] row_data;
+	}
+}
+
+// access operator (const)
+double Row::operator[](unsigned int column) const{
+	if (column >= length) {
+		throw(out_of_range("Column is out of range"));
+	}
+	return row_data[column];
+}
+
+// access operator (non-const)
+double& Row::operator[](unsigned int column){
+	if (column >= length) {
+		throw(out_of_range("Column is out of range"));
+	}
+	return row_data[column];
+}
+
+// assignment operator
+Row& Row::operator= (const Row& rhs){
+	if(&rhs != this){
+		// Delete the current row matrix
+		if(length > 0){
+			delete[] this->row_data;
+		}
+		// New row matrix gets length from previous matrix
+		this->length = rhs.length;
+		// Create new array in heap with new length
+		this->row_data = new double[this->length];
+		// Copy all row_data values over to new array
+		for(int i = 0; i < this->length; i ++) {
+			this->row_data[i] = rhs.row_data[i];
+		}
+	}
+	// Return address of the Row
+	return *this;
+}
+
+// clear row data
+void Row::clear(){
+	for(int i = 0; i < length; i++) {
+		this->row_data[i] = 0;
+	}
+}

Lab3/row.h

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+#ifndef row_h
+#define row_h
+class Row{
+	public:
+		/* Parameterized constructor
+		 * Takes in length and creates a row matrix with values cleared
+		 * to zero
+		 */ 
+		Row(unsigned int length);
+
+		/* Copy constructor
+		 * Create a new row matrix with the same size and values as the
+		 * from matrix
+		 */ 
+		Row(const Row& from);
+		
+		/* Destructor
+		 * Correctly delete any heap memory
+		 */ 
+		~Row();
+		
+		/* Access operator (const version)
+		 * Allow access to row matrix data
+		 * Should return an exception if column is too large
+		*/ 
+		double operator[](unsigned int column) const;
+		
+		/* Access operator (non const version)
+		 * Allow access to row matrix data
+		 * Should return an exception if column is too large
+		 */ 
+		double& operator[] (unsigned int column);
+		
+		/* Assignment operator 
+		 * 1. Check if two sides are the same object
+		 * 2. Delete the current row matrix
+		 * 3. Create a new row matrix with the same size and values as
+		 *    the rhs matrix
+		 */ 
+		Row& operator= (const Row& rhs);
+		
+		/* Clear all data values to zero
+		 */ 
+		void clear();
+	private:
+		// Row matrix data
+		double * row_data;
+		// Size of row matrix
+		unsigned int length;
+};		
+#endif