bit of vibe coding in matrix.c

matrix.c

@@ -16,17 +16,45 @@ void clearMatrix(Matrix *matrix)
 
 void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+    matrix.data[rowIdx][colIdx] = value;
 }
 
 MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
 {
-    
+    MatrixType value = matrix.data[rowIdx][colIdx];
+    return value;
 }
 
 Matrix add(const Matrix matrix1, const Matrix matrix2)
 {
+    Matrix invalidResult = {0};
 
+    if (
+        matrix1.rows == 0 || matrix1.cols == 0 || matrix2.rows == 0 || matrix2.cols == 0 ||
+        matrix1.rows != matrix2.rows || matrix1.cols != matrix2.cols ||
+        matrix1.data == NULL || matrix2.data == NULL
+    )
+    {
+        return invalidResult;
+    }
+
+    Matrix result = createMatrix(matrix1.rows, matrix1.cols);
+    if (result.data == NULL)
+        return invalidResult;
+
+    for (unsigned int row = 0; row < matrix1.rows; row++)
+    {
+        MatrixType *dstRow = result.data[row];
+        MatrixType *row1 = matrix1.data[row];
+        MatrixType *row2 = matrix2.data[row];
+
+        for (unsigned int col = 0; col < matrix1.cols; col++)
+        {
+            dstRow[col] = row1[col] + row2[col];
+        }
+    }
+
+    return result;
 }
 
 Matrix multiply(const Matrix matrix1, const Matrix matrix2)

matrix.h

@@ -5,7 +5,12 @@
 
 typedef float MatrixType;
 
-// TODO Matrixtyp definieren
+typedef struct
+{
+    MatrixType **data;
+    unsigned int rows;
+    unsigned int cols;
+} Matrix;
 
 
 Matrix createMatrix(unsigned int rows, unsigned int cols);