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Matrix fertig

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Giorgi Kesidis 2025-11-10 19:54:47 +01:00
parent 8722f104a6
commit f0cd9abe2b
1 changed files with 74 additions and 9 deletions
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79
matrix.c
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@ -1,6 +1,7 @@
#include <stdlib.h> #include <stdlib.h>
#include <string.h> #include <string.h>
#include "matrix.h" #include "matrix.h"
#include <stdio.h>
// TODO Matrix-Funktionen implementieren // TODO Matrix-Funktionen implementieren
@ -10,9 +11,10 @@ Matrix createMatrix(unsigned int rows, unsigned int cols)
matrix.rows = rows; matrix.rows = rows;
matrix.cols = cols; matrix.cols = cols;
matrix.data = (MatrixType *)malloc(rows* cols* sizeof(MatrixType)); matrix.data = (MatrixType *)malloc(rows * cols * sizeof(MatrixType));
if(matrix.data == NULL){ if (matrix.data == NULL)
{
matrix.rows = 0; matrix.rows = 0;
matrix.cols = 0; matrix.cols = 0;
@ -31,35 +33,98 @@ Matrix createMatrix(unsigned int rows, unsigned int cols)
void clearMatrix(Matrix *matrix) void clearMatrix(Matrix *matrix)
{ {
if(matrix->data != NULL) if (matrix->data != NULL)
{ {
free(matrix->data); free(matrix->data);
matrix->data = NULL; matrix->data = NULL;
} }
matrix->rows = 0; matrix->rows = 0;
matrix->cols =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(rowIdx >= matrix.rows || colIdx >= matrix.cols) if (rowIdx >= matrix.rows || colIdx >= matrix.cols)
{ {
fprintf(stderr, "Fehler: Ungültiger Index (%u, %u) bei Matrixgröße %u x %u\n", rowIdx, colIdx, matrix.rows, matrix.cols); fprintf(stderr, "Fehler: Ungültiger Index (%u, %u) bei Matrixgröße %u x %u\n", rowIdx, colIdx, matrix.rows, matrix.cols);
return; // abbruch falls fehler
} }
matrix.data[rowIdx * matrix.cols +colIdx] = value; matrix.data[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 (rowIdx >= matrix.rows || colIdx >= matrix.cols)
{
fprintf(stderr, "Fehler: Ungültiger Index (%u, %u) bei Matrixgröße %u x %u\n", rowIdx, colIdx, matrix.rows, matrix.cols);
return UNDEFINED_MATRIX_VALUE;
}
return matrix.data[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)
{
fprintf(stderr, "Fehler: Matrizen haben unterschiedliche Größen (%u x %u) und (%u x %u)\n",
matrix1.rows, matrix1.cols, matrix2.rows, matrix2.cols);
Matrix empty = {0, 0, NULL};
return empty;
}
Matrix result = createMatrix(matrix1.rows, matrix1.cols);
if (result.data == NULL)
{
fprintf(stderr, "Fehler: Speicher konnte nicht reserviert werden!\n");
return result;
}
for (int i = 0; i < matrix1.rows; i++)
{
for (int j = 0; j < matrix1.cols; j++)
{
result.data[i * result.cols + j] = matrix1.data[i * matrix1.cols + j] + matrix2.data[i * matrix2.cols + j];
}
}
return result;
} }
Matrix multiply(const Matrix matrix1, const Matrix matrix2) Matrix multiply(const Matrix matrix1, const Matrix matrix2)
{ {
if (matrix1.cols != matrix2.rows)
{
fprintf(stderr, "Fehler: Matrizen der Dimension (%u x %u) und (%u x %u) koennen nicht multipliziert werden\n",
matrix1.rows, matrix1.cols, matrix2.rows, matrix2.cols);
Matrix empty = {0, 0, NULL};
return empty;
}
Matrix result = createMatrix(matrix1.rows, matrix2.cols);
if (result.data == NULL)
{
fprintf(stderr, "Fehler: Speicher konnte nicht reserviert werden!\n");
return result;
}
for (int i = 0; i < matrix1.rows; i++)
{
for (int j = 0; j < matrix2.cols; j++)
{
MatrixType sum = 0.0;
for (int k = 0; k < matrix1.cols; k++)
{
sum += matrix1.data[i * matrix1.cols + k] * matrix2.data[k * matrix2.cols + j];
}
result.data[i * result.cols +j] = sum;
}
}
return result;
} }