info2Praktikum-NN/Startcode/matrix.c

#include <stdlib.h>
#include <string.h>
#include "matrix.h"

// TODO Matrix-Funktionen implementieren (done)
//Matrix Zeilen und Spaltenanzahl festlegen
Matrix createMatrix(unsigned int rows, unsigned int cols)
{
    Matrix matrix;
    matrix.rows = rows;
    matrix.cols = cols;
    clearMatrix(&matrix);
    return matrix;
}
//Matrix Speicher leeren
void clearMatrix(Matrix *matrix)                                
{
    for (int i=0; i < (*matrix).rows; i++)
    {
        for (int j = 0; j < (*matrix).cols; j++)
        {
            (*matrix).array[j][i] = 0;
        }       
    }
}
//Matrix Werte setzen
void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
{
    if (rowIdx < 28 && colIdx < 28)
    {
        matrix.array[rowIdx][colIdx] = value;
    }
}
//Matrix Werte auslesen
MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
{
     if (rowIdx < 28 && colIdx < 28)
    {
        return matrix.array[rowIdx][colIdx];
    }
    return 0;
}
//Matrizen addieren
Matrix add(const Matrix matrix1, const Matrix matrix2)          
{
    Matrix result = createMatrix(matrix1.rows, matrix1.cols);
    if ((matrix1.rows != matrix2.rows) || (matrix1.cols != matrix2.cols))   //Überprüfung der Addierbarkeit zweier Matrizen
    {
        return result;
    }
    for (int i = 0; i < matrix1.rows; i++)
    {
        for (int j = 0; j < matrix1.cols; j++)
        {
            result.array[i][j] = matrix1.array[i][j] + matrix2.array[i][j];
        }
    }
    return result;
}
//Matrizen multiplizieren
Matrix multiply(const Matrix matrix1, const Matrix matrix2)     
{
    Matrix result = createMatrix(matrix1.rows, matrix2.cols);
    if (matrix1.cols != matrix2.rows)                           //Überprüfung der Multiplizierbarkeit zweier Matrizen
    {
        return result;
    }
    for (int i = 0; i < matrix1.rows; i++)
    {
        for (int j = 0; j < matrix2.cols; j++)
        {
            for (int k = 0; k < matrix1.cols; k++)
            {
                result.array[i][j] += (matrix1.array[i][k] * matrix2.array[k][j]);
            }
        }
    }
    return result;
}