matrix-cpp

Implementation of the s21_matrix_oop.h library.

Dependencies

• Work only in based UNIX system
• Make sure you have a make & gtest utilities
• To format the code style you will need the clang-format option

A reminder of the matrix basics

Matrix is a rectangular table of numbers arranged in m rows and n columns:

    1 2 3
A = 4 5 6
    7 8 9

     1  2  3  4
В =  5  6  7  8
     9 10 11 12

Matrix operations

Below is a brief description of the matrix operations that need to be implemented in the development library. They are similar to the operations you performed earlier in "Structured Programming", so you can see a more detailed description of them there. Note that some operations have exceptional situations that require special handling using the exception mechanism.

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, you also need to implement constructors and destructors:

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.

And you also need to overload the following operators, 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.