matrix c und h grundsätzlich gemacht, abbruchbedingungen unvollständig
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51
matrix.c
51
matrix.c
@ -4,32 +4,81 @@
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// TODO Matrix-Funktionen implementieren
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Matrix createMatrix(unsigned int rows, unsigned int cols)
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{
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Matrix matrix;
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matrix.rows = rows;
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matrix.cols = cols;
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if(rows == 0 || cols == 0){
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matrix.werte = NULL;
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return matrix;
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}
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matrix.werte = malloc(rows * cols * sizeof(MatrixType));
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return matrix;
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}
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void clearMatrix(Matrix *matrix)
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{
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//speicher freimachen:
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free(matrix->werte);
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}
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void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
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{
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matrix.werte[rowIdx * matrix.cols + colIdx] = value;
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}
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MatrixType getMatrixAt(const Matrix matrix, unsigned int rowIdx, unsigned int colIdx)
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{
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return matrix.werte[rowIdx * matrix.cols + colIdx];
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}
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Matrix add(const Matrix matrix1, const Matrix matrix2)
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{
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if(matrix1.rows != matrix2.rows || matrix1.cols != matrix2.cols){
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//nicht sicher
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}
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Matrix ergebnisMatrix = createMatrix(matrix1.rows, matrix1.cols);
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for(int reihe = 0; reihe < matrix1.rows; reihe++){
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for(int spalte = 0; spalte < matrix1.cols; spalte++){
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MatrixType wertM1 = getMatrixAt(matrix1, reihe, spalte);
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MatrixType wertM2 = getMatrixAt(matrix2, reihe, spalte);
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setMatrixAt(wertM1 + wertM2, ergebnisMatrix, reihe, spalte);
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}
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}
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return ergebnisMatrix;
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}
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Matrix multiply(const Matrix matrix1, const Matrix matrix2)
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{
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Matrix ergebnisMatrix = createMatrix(matrix1.rows, matrix2.cols);
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for(int i = 0; i < matrix1.rows; i++){
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for(int j = 0; j < matrix2.cols; j++){
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MatrixType summe = 0;
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for(int l = 0; l < matrix1.cols; l++){
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summe += getMatrixAt( matrix1, i, l) * getMatrixAt(matrix2, l, j);
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}
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setMatrixAt(summe, ergebnisMatrix, i, j);
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}
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}
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return ergebnisMatrix;
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}
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6
matrix.h
6
matrix.h
@ -6,8 +6,14 @@
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typedef float MatrixType;
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// TODO Matrixtyp definieren
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typedef struct {
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unsigned int rows;
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unsigned int cols;
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float *werte;
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} Matrix;
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Matrix createMatrix(unsigned int rows, unsigned int cols);
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void clearMatrix(Matrix *matrix);
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void setMatrixAt(MatrixType value, Matrix matrix, unsigned int rowIdx, unsigned int colIdx);
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