added if clause to check for fittig matrix dimensions

matrix.c

@@ -23,50 +23,39 @@ void clearMatrix(Matrix *matrix)
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    if (rowIdx >= matrix.rows || colIdx >= matrix.cols){
+    
-        printf("Index out of bounds\n"); //Error Message because Index Input exceeds Matrix
-}
-    else{
-        matrix.buffer[rowIdx * matrix.cols + colIdx] = value; //Writes Value of value variable in the selected place in Matrix
-}
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    if (rowIdx >= matrix.rows || colIdx >= matrix.cols){
-       printf("Index out of bounds\n");
-       return 0;
-    }
-    else{
     
-       MatrixType value = matrix.buffer[rowIdx * matrix.cols + colIdx]; //Stores value of selected place of Matrix in value variable
-        return value;
 }
-  }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
-    Matrix MatrixErgebnis = createMatrix(matrix1.rows, matrix1.cols); //Creating Result Matrix
-    if(matrix1.cols != matrix2.cols || matrix1.rows != matrix2.rows){
-        printf("Matrix dimensions do not match\n"); //Error Message if dimensions of Input Matrixes are not identical
-        MatrixErgebnis = clearMatrix(MatrixErgebnis);
-        return MatrixErgebnis;
-    }
-    else{
     
-        for (unsigned int i = 0; i < matrix1.rows; i++){
-            for (unsigned int j = 0; j < matrix1.cols; j++){
-                //Adding Matrix Elements of same row and col index together and store in new Matrix
-                MatrixErgebnis.buffer[i * matrix1.cols + j] = matrix1.buffer[i * matrix1.cols + j] + matrix2.buffer[i * matrix1.cols + j];
-
-                }
-        }
-
-  }
-return MatrixErgebnis;
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)
 {
+    if (matrix1.rows == matrix2.cols) {
+        Matrix result;
+	    result.rows = matrix1.rows;
+        result.cols = matrix2.cols;
 
+        result.buffer = malloc(result.rows * result.cols * sizeof(MatrixType));
+
+        for(int i = 0; i < rows; i++) {
+            for(int j = 0; j < cols; j++) {
+                MatrixType value = 0;
+                for(int k = 0; k < matrix1.cols; k++) {
+                    value += matrix1[i][k] * matrix2[k][j];
+                }
+                result.buffer[i][i] = value;
+            }
+        }
+        return result;
+    }
+    printf("Die angegebenen Matrizen haben keine passenden Dimensionen für die Multiplikation");
+    return NULL;
 }