matrix.h aktualisiert

matrix.h hinzugefügt

matrix.c

@@ -4,32 +4,80 @@
 
 // TODO Matrix-Funktionen implementieren
 
-Matrix createMatrix(unsigned int rows, unsigned int cols)
+MatrixType createMatrix(unsigned int rows, unsigned int cols)
 {
-    
+    MatrixType m;
+    m.rows = rows;
+    m.cols = cols;
+    m.values = (MatrixType *)malloc(rows * cols * sizeof(MatrixType));
+    if (m.values == NULL) {
+        m.rows = 0;
+        m.cols = 0;
+        return m;
+    }
+    for (unsigned int i = 0; i < rows * cols; ++i) {
+        m.values[i] = 0.0; // Standardwert
+    }
+    return m;
 }
 
 void clearMatrix(Matrix *matrix)
 {
-    
+    if (matrix->values != NULL) {
+        free(matrix->values);
+    }
+    matrix->values = NULL;
+    matrix->rows = 0;
+    matrix->cols = 0;
 }
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+    if (rowIdx < matrix.rows && colIdx < matrix.cols) {
+        matrix.values[rowIdx * matrix.cols + colIdx] = value;
+    }
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+    if (rowIdx < matrix.rows && colIdx < matrix.cols) {
+        return matrix.values[rowIdx * matrix.cols + colIdx];
+    }
+    return 0.0; // Fallback-Wert
 }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
-    
+    Matrix result = createMatrix(0, 0);
+    if (matrix1.rows != matrix2.rows || matrix1.cols != matrix2.cols) {
+        return result;
+    }
+
+    result = createMatrix(matrix1.rows, matrix1.cols);
+    for (unsigned int i = 0; i < matrix1.rows; ++i) {
+        for (unsigned int j = 0; j < matrix1.cols; ++j) {
+            MatrixType sum = getMatrixAt(matrix1, i, j) + getMatrixAt(matrix2, i, j);
+            setMatrixAt(sum, result, i, j);
+        }
+    }
+    return result;
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
-    
-}
+    Matrix result = createMatrix(0, 0);
+    if (matrix1.cols != matrix2.rows) {
+        return result;
+    }
+
+    result = createMatrix(matrix1.rows, matrix2.cols);
+    for (unsigned int i = 0; i < matrix1.rows; ++i) {
+        for (unsigned int j = 0; j < matrix2.cols; ++j) {
+            MatrixType sum = 0.0;
+            for (unsigned int k = 0; k < matrix1.cols; ++k) {
+                sum += getMatrixAt(matrix1, i, k) * getMatrixAt(matrix2, k, j);
+            }
+            setMatrixAt(sum, result, i, j);
+        }
+    }
+    return result;

matrix.h

@@ -6,7 +6,11 @@
 typedef float MatrixType;
 
 // TODO Matrixtyp definieren
-
+typedef struct {
+    MatrixType *buffer;
+    MatrixType rows;
+    MatrixType cols;
+}Matrix;
 
 Matrix createMatrix(unsigned int rows, unsigned int cols);
 void clearMatrix(Matrix *matrix);