CPP_Matrix

Implementation of the matrix_oop.h library in C++ programming language using the object-oriented approach

Description

This project is an extension of my C_Matrix project

Important notes

• The library has been developed in C++ language of C++17 standard using gcc compiler;
• Library code follows the Google style;
• Full coverage of library functions code has been prepared with unit-tests using the GTest library;

Matrix operations

Below is a brief description of the matrix operations that has been implemented in the development library

Operation	Description	Exceptional situations
bool EqMatrix(const S21Matrix& other)	Checks matrices for equality with each other.
void SumMatrix(const S21Matrix& other)	Adds the second matrix to the current one	different matrix dimensions.
void SubMatrix(const S21Matrix& other)	Subtracts another matrix from the current one	different matrix dimensions.
void MulNumber(const double num)	Multiplies the current matrix by a number.
void MulMatrix(const S21Matrix& other)	Multiplies the current matrix by the second matrix.	The number of columns of the first matrix is not equal to the number of rows of the second matrix.
S21Matrix Transpose()	Creates a new transposed matrix from the current one and returns it.
S21Matrix CalcComplements()	Calculates the algebraic addition matrix of the current one and returns it.	The matrix is not square.
double Determinant()	Calculates and returns the determinant of the current matrix.	The matrix is not square.
S21Matrix InverseMatrix()	Calculates and returns the inverse matrix.	Matrix determinant is 0.

Apart from those operations, these constructors and destructors are implemented:

Method	Description
S21Matrix()	A basic constructor that initialises a matrix of some predefined dimension.
S21Matrix(int rows, int cols)	Parametrized constructor with number of rows and columns.
S21Matrix(const S21Matrix& other)	Copy constructor.
S21Matrix(S21Matrix&& other)	Move constructor.
~S21Matrix()	Destructor.

The following operators are overloaded, partly corresponding to the operations above:

Operator	Description	Exceptional situations
+	Addition of two matrices.	Different matrix dimensions.
-	Subtraction of one matrix from another.	Different matrix dimensions.
*	Matrix multiplication and matrix multiplication by a number.	The number of columns of the first matrix does not equal the number of rows of the second matrix.
==	Checks for matrices equality (EqMatrix).
=	Assignment of values from one matrix to another one.
+=	Addition assignment (SumMatrix)	different matrix dimensions.
-=	Difference assignment (SubMatrix)	different matrix dimensions.
*=	Multiplication assignment (MulMatrix/MulNumber).	The number of columns of the first matrix does not equal the number of rows of the second matrix.
(int i, int j)	Indexation by matrix elements (row, column).	Index is outside the matrix.