add_matrix Funktion erstellt

matrix.c

@@ -29,21 +29,127 @@ Matrix createMatrix(unsigned int rows, unsigned int cols)
 
 void clearMatrix(Matrix *matrix)
 {
+    free(matrix->data);
     
+    matrix->rows = 0;
+    matrix->cols = 0;
+    matrix->data = NULL;
 }
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+   
+  matrix.data[(rowIdx * matrix.cols) + colIdx] = value;   //wir setzen den data-Wert an der Stelle (rowIdx*Spalten + colIdx) auf den Wert von value
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+    return matrix.data[(rowIdx * matrix.cols) + colIdx];
 }
 
-Matrix add(const Matrix matrix1, const Matrix matrix2)
+static int can_add(Matrix matrix1, Matrix matrix2) {
+
+    int can_add;
+
+    if(matrix1.cols == matrix2.cols && matrix1.rows == matrix2.rows){
+
+        can_add = 1;
+
+    }
+    else if(matrix1.cols == 1 && matrix1.rows == matrix2.rows){
+
+        can_add = 2;
+
+    }
+    else if(matrix2.cols == 1 && matrix1.rows == matrix2.rows){
+
+        can_add = 3;
+
+    }
+    else if(matrix1.rows == 1 && matrix1.cols == matrix2.cols){
+
+        can_add = 4;
+
+    }
+    else if(matrix2.rows == 1 && matrix1.cols == matrix2.cols){
+
+        can_add = 5;
+
+    }
+    else{
+
+        can_add = 0;
+
+    }
+
+    return can_add;
+    }
+
+Matrix add(const Matrix matrix1, const Matrix matrix2) //wir addieren nur wenn beide Matrizen gleich groß sind oder eine von beiden eine Zeile oder eine Spalte besitzt
 {
+    int ok = can_add(matrix1,matrix2);
+    
+    unsigned int erg_rows = (matrix1.rows == matrix2.rows) ? matrix1.rows : (matrix1.rows == 1 ? matrix2.rows : matrix1.rows);
+    unsigned int erg_cols = (matrix1.cols == matrix2.cols) ? matrix1.cols : (matrix1.cols == 1 ? matrix2.cols : matrix1.cols);
+    
+    Matrix matrix_erg = createMatrix(erg_rows, erg_cols);
+
+    switch(ok)
+    {
+    case 1: 
+    
+        for(int i = 0; i < (matrix1.rows * matrix1.cols); i++)
+
+            matrix_erg.data[i] = matrix1.data[i] + matrix2.data[i];
+            
+        break;
+
+    case 2:
+
+        for(int i = 0; i < erg_rows; i++){
+            for(int j = 0; j < erg_cols; j++)
+
+                matrix_erg.data[i * erg_cols + j] = matrix1.data[i * erg_cols + j] + matrix2.data[i];
+        }
+        break;
+
+    case 3:
+    
+        for(int i = 0; i < erg_rows; i++){
+            for(int j = 0; j < erg_cols; j++)
+
+                matrix_erg.data[i * erg_cols + j] = matrix1.data[i] + matrix2.data[i * erg_cols + j];
+        }
+        break;
+
+    case 4:
+
+        for(int i = 0; i < erg_rows; i++){
+            for(int j = 0; j < erg_cols; j++)
+
+                matrix_erg.data[i * erg_cols + j] = matrix1.data[i * erg_cols + j] + matrix2.data[j];
+        }
+        break;
+
+    case 5:
+    
+        for(int i = 0; i < erg_rows; i++){
+            for(int j = 0; j < erg_cols; j++)
+
+                matrix_erg.data[i * erg_cols + j] = matrix1.data[j] + matrix2.data[i * erg_cols + j];
+        }
+        break;
+
+    default: 
+        printf("Matrix addition not possible\n");
+        exit(EXIT_FAILURE);
+
+    
+    }
+
+return matrix_erg;
+
+    
     
 }