Matrixpart

Startcode/matrix.c

@@ -2,34 +2,78 @@
 #include <string.h>
 #include "matrix.h"
 
-// TODO Matrix-Funktionen implementieren
-
+// 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;
 }
-
-void clearMatrix(Matrix *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;
 }
-
-Matrix add(const Matrix matrix1, const Matrix matrix2)
+//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;
 }
-
-Matrix multiply(const Matrix matrix1, const Matrix matrix2)
+//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;
 }