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2 changed files with 9 additions and 106 deletions

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@ -6,122 +6,30 @@
Matrix createMatrix(unsigned int rows, unsigned int cols) Matrix createMatrix(unsigned int rows, unsigned int cols)
{ {
Matrix matrix;
matrix.rows = rows;
matrix.cols = cols;
matrix.buffer = malloc(rows * cols * sizeof(float));
if(matrix.buffer == NULL)
{
printf("Fehler bei der Speicherreservierung! Keine Matrix erstellt!");
matrix.rows = 0;
matrix.cols = 0;
}
return matrix;
} }
void clearMatrix(Matrix *matrix) void clearMatrix(Matrix *matrix)
{ {
free(matrix.buffer);
matrix->buffer = NULL;
matrix->rows = 0;
matrix->cols = 0;
} }
void setMatrixAt(MatrixType value, Matrix *matrix, unsigned int rowIdx, unsigned int colIdx) void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
{ {
if(matrix->buffer == NULL)
{
printf("Fehler beim Setzen! Matrix nicht initialisiert");
return;
}
if(rowIdx >= matrix->rows || colIdx >= matrix->cols)
{
printf("Ungueltige Indizes beim Setzen!\n");
return;
}
matrix->buffer[rowIdx * matrix->cols + colIdx] = value;
} }
MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx) MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
{ {
if(matrix.buffer == NULL)
{
printf("Fehler beim Lesen! Matrix nicht initialisiert");
return 0;
}
if(rowIdx >= matrix.rows || colIdx >= matrix.cols)
{
printf("Ungueltige Indizes beim Lesen!\n");
return 0;
}
return matrix.buffer[rowIdx * matrix.cols + colIdx];
} }
Matrix add(const Matrix matrix1, const Matrix matrix2) Matrix add(const Matrix matrix1, const Matrix matrix2)
{ {
if((matrix1.rows != matrix2.rows) || (matrix1.cols != matrix2.cols))
{
printf("Fehler bei Addition: Matrix Dimensionen passen nicht ueberein!\n");
Matrix empty = {0, 0, NULL};
return empty;
}
float matrix1Wert = 0;
float matrix2Wert = 0;
float summe = 0;
Matrix ergebnisMatrix = createMatrix(matrix1.rows, matrix1.cols);
for(int row = 0; row < ergebnisMatrix.rows; row++)
{
for(int col = 0; col < ergebnisMatrix.cols; col++)
{
matrix1Wert = getMatrixAt(matrix1, row, col);
matrix2Wert = getMatrixAt(matrix2, row, col);
summe = matrix1Wert + matrix2Wert;
setMatrixAt(summe, &ergebnisMatrix, row, col);
}
}
return ergebnisMatrix;
} }
Matrix multiply(const Matrix matrix1, const Matrix matrix2) Matrix multiply(const Matrix matrix1, const Matrix matrix2)
{ {
if(matrix1.cols != matrix2.rows)
{
printf("Fehler bei Multiplikation: Matrix Dimensionen passen nicht ueberein!\n");
Matrix empty = {0, 0, NULL};
return empty;
}
float erg = 0;
Matrix ergebnisMatrix = createMatrix(matrix1.rows, matrix2.cols);
for(int row = 0; row < ergebnisMatrix.rows; row++)
{
for(int col = 0; col < ergebnisMatrix.cols; col++)
{
erg = 0;
for(int k = 0; k < matrix1.cols; k++)
{
erg += getMatrixAt(matrix1, row, k) * getMatrixAt(matrix2, k, col);
}
setMatrixAt(erg, &ergebnisMatrix, row, col);
}
}
return ergebnisMatrix;
} }

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@ -6,12 +6,7 @@
typedef float MatrixType; typedef float MatrixType;
// TODO Matrixtyp definieren // TODO Matrixtyp definieren
typedef struct
{
int rows;
int cols;
float *buffer;
} Matrix;
Matrix createMatrix(unsigned int rows, unsigned int cols); Matrix createMatrix(unsigned int rows, unsigned int cols);
void clearMatrix(Matrix *matrix); void clearMatrix(Matrix *matrix);