matrix fehler behoben

matrix.c

@@ -1,8 +1,8 @@
 #include <stdlib.h>
 #include <string.h>
 #include "matrix.h"
+#include <stdio.h>
 
-// TODO Matrix-Funktionen implementieren
 
 // Matrix erzeugen
 Matrix createMatrix(unsigned int rows, unsigned int cols)
@@ -12,28 +12,32 @@ Matrix createMatrix(unsigned int rows, unsigned int cols)
     matrix.rows = 0;
     matrix.cols = 0;
 
+    if (rows == 0 || cols == 0)
+        return matrix; // leere Matrix
 
-    // Wenn die Dimensionen gültig sind, Speicher reservieren
-    if (rows > 0 && cols > 0) 
-    {
     matrix.buffer = (MatrixType *)malloc(rows * cols * sizeof(MatrixType));
-        if (matrix.buffer != NULL)
+    if (!matrix.buffer)
-        {
+        return matrix; // Speicher konnte nicht reserviert werden
+
     matrix.rows = rows;
     matrix.cols = cols;
-        }
+
-    }
+    // Initialisiere alle Werte auf UNDEFINED_MATRIX_VALUE
+    for (unsigned int i = 0; i < rows * cols; i++)
+        matrix.buffer[i] = UNDEFINED_MATRIX_VALUE;
+
     return matrix;
 }
 
 // Matrix Speicher freigeben
 void clearMatrix(Matrix *matrix)
 {
-    if (matrix->buffer != NULL)
+    if (!matrix) return;
-    {
+
+    if (matrix->buffer)
         free(matrix->buffer);
+
     matrix->buffer = NULL;
-    }
     matrix->rows = 0;
     matrix->cols = 0;
 }
@@ -41,66 +45,83 @@ void clearMatrix(Matrix *matrix)
 // Wert setzen
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    if (rowIdx < matrix.rows && colIdx < matrix.cols)
+    if (!matrix.buffer) return;
-    {
+    if (rowIdx >= matrix.rows || colIdx >= matrix.cols) return;
+
     matrix.buffer[rowIdx * matrix.cols + colIdx] = value;
-    }
 }
 
 // Wert auslesen
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    if (rowIdx < matrix.rows && colIdx < matrix.cols)
+    if (!matrix.buffer) return UNDEFINED_MATRIX_VALUE;
-    {
+    if (rowIdx >= matrix.rows || colIdx >= matrix.cols) return UNDEFINED_MATRIX_VALUE;
-        return matrix.buffer[rowIdx * matrix.cols + colIdx];
-    }
-    return 0; // Fallback
-}
 
+    return matrix.buffer[rowIdx * matrix.cols + colIdx];
+}
 // Matrizen addieren
 Matrix add(const Matrix m1, const Matrix m2)
 {
-    if (m1.rows != m2.rows || m1.cols != m2.cols)
+    if (!m1.buffer || !m2.buffer) return createMatrix(0,0);
-    {
-        return createMatrix(0, 0); // Falls Matrix-Dimensionen nicht passen
-    }
 
+    // gleiche Dimension
+    if (m1.rows == m2.rows && m1.cols == m2.cols)
+    {
         Matrix result = createMatrix(m1.rows, m1.cols);
-    if (result.buffer == NULL) return result;
+        if (!result.buffer) return result;
 
         for (unsigned int r = 0; r < m1.rows; r++)
-    {
             for (unsigned int c = 0; c < m1.cols; c++)
-        {
+                result.buffer[r * result.cols + c] = m1.buffer[r * m1.cols + c] + m2.buffer[r * m2.cols + c];
-            result.buffer[r * m1.cols + c] =
-                getMatrixAt(m1, r, c) + getMatrixAt(m2, r, c);
-        }
-    }
-    return result;
-}
 
+        return result;
+    }
+
+    // Matrix2 ist ein Spaltenvektor
+    if (m1.rows == m2.rows && m2.cols == 1)
+    {
+        Matrix result = createMatrix(m1.rows, m1.cols);
+        if (!result.buffer) return result;
+
+        for (unsigned int r = 0; r < m1.rows; r++)
+            for (unsigned int c = 0; c < m1.cols; c++)
+                result.buffer[r * result.cols + c] = m1.buffer[r * m1.cols + c] + m2.buffer[r];
+
+        return result;
+    }
+
+    // Matrix1 ist ein Spaltenvektor
+    if (m1.rows == m2.rows && m1.cols == 1)
+    {
+        Matrix result = createMatrix(m2.rows, m2.cols);
+        if (!result.buffer) return result;
+
+        for (unsigned int r = 0; r < m2.rows; r++)
+            for (unsigned int c = 0; c < m2.cols; c++)
+                result.buffer[r * result.cols + c] = m1.buffer[r] + m2.buffer[r * m2.cols + c];
+
+        return result;
+    }
+
+    // passt nicht
+    return createMatrix(0,0);
+}
 // Matrizen multiplizieren
 Matrix multiply(const Matrix m1, const Matrix m2)
 {
-    if (m1.cols != m2.rows)
+    if (!m1.buffer || !m2.buffer) return createMatrix(0,0);
-    {
+    if (m1.cols != m2.rows) return createMatrix(0,0);
-        return createMatrix(0, 0); // Falls Matrix-Dimensionen nicht passen
-    }
 
     Matrix result = createMatrix(m1.rows, m2.cols);
-    if (result.buffer == NULL) return result;
+    if (!result.buffer) return result;
 
     for (unsigned int r = 0; r < m1.rows; r++)
-    {
         for (unsigned int c = 0; c < m2.cols; c++)
         {
             MatrixType sum = 0;
             for (unsigned int k = 0; k < m1.cols; k++)
-            {
+                sum += m1.buffer[r * m1.cols + k] * m2.buffer[k * m2.cols + c];
-                sum += getMatrixAt(m1, r, k) * getMatrixAt(m2, k, c);
+            result.buffer[r * result.cols + c] = sum;
-            }
-            result.buffer[r * m2.cols + c] = sum;
-        }
         }
 
     return result;