lab 3 start

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;
+	}
+}