matrix c und h grundsätzlich gemacht, abbruchbedingungen unvollständig

This commit is contained in:
Simon Dietrich 2025-11-19 12:36:06 +01:00
parent 4bf78b9893
commit 4893304ccd
2 changed files with 60 additions and 5 deletions

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@ -4,32 +4,81 @@
// TODO Matrix-Funktionen implementieren // TODO Matrix-Funktionen implementieren
Matrix createMatrix(unsigned int rows, unsigned int cols) Matrix createMatrix(unsigned int rows, unsigned int cols)
{ {
Matrix matrix;
matrix.rows = rows;
matrix.cols = cols;
if(rows == 0 || cols == 0){
matrix.werte = NULL;
return matrix;
}
matrix.werte = malloc(rows * cols * sizeof(MatrixType));
return matrix;
} }
void clearMatrix(Matrix *matrix) void clearMatrix(Matrix *matrix)
{ {
//speicher freimachen:
free(matrix->werte);
} }
void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx) void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
{ {
matrix.werte[rowIdx * matrix.cols + colIdx] = value;
} }
MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx) MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
{ {
return matrix.werte[rowIdx * matrix.cols + colIdx];
} }
Matrix add(const Matrix matrix1, const Matrix matrix2) Matrix add(const Matrix matrix1, const Matrix matrix2)
{ {
if(matrix1.rows != matrix2.rows || matrix1.cols != matrix2.cols){
//nicht sicher
}
Matrix ergebnisMatrix = createMatrix(matrix1.rows, matrix1.cols);
for(int reihe = 0; reihe < matrix1.rows; reihe++){
for(int spalte = 0; spalte < matrix1.cols; spalte++){
MatrixType wertM1 = getMatrixAt(matrix1, reihe, spalte);
MatrixType wertM2 = getMatrixAt(matrix2, reihe, spalte);
setMatrixAt(wertM1 + wertM2, ergebnisMatrix, reihe, spalte);
}
}
return ergebnisMatrix;
} }
Matrix multiply(const Matrix matrix1, const Matrix matrix2) Matrix multiply(const Matrix matrix1, const Matrix matrix2)
{ {
Matrix ergebnisMatrix = createMatrix(matrix1.rows, matrix2.cols);
for(int i = 0; i < matrix1.rows; i++){
for(int j = 0; j < matrix2.cols; j++){
MatrixType summe = 0;
for(int l = 0; l < matrix1.cols; l++){
summe += getMatrixAt( matrix1, i, l) * getMatrixAt(matrix2, l, j);
}
setMatrixAt(summe, ergebnisMatrix, i, j);
}
}
return ergebnisMatrix;
} }

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@ -6,8 +6,14 @@
typedef float MatrixType; typedef float MatrixType;
// TODO Matrixtyp definieren // TODO Matrixtyp definieren
typedef struct {
unsigned int rows;
unsigned int cols;
float *werte;
} Matrix;
Matrix createMatrix(unsigned int rows, unsigned int cols); Matrix createMatrix(unsigned int rows, unsigned int cols);
void clearMatrix(Matrix *matrix); void clearMatrix(Matrix *matrix);
void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx); void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx);