77 lines
2 KiB
C
77 lines
2 KiB
C
#include "matrix.h"
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#include <stdlib.h>
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#include <stdio.h>
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Matrix* matrix_create(int rows, int columns) {
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// allocate memory for the matrix
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Matrix* matrix = malloc(sizeof(Matrix));
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// set size variables to the correct size
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matrix->rows = rows;
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matrix->columns = columns;
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// allocate memory for the numbers (2D-Array)
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matrix->numbers = malloc(sizeof(double*) * rows);
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for (int i = 0; i < rows; i++) {
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matrix->numbers[i] = malloc(sizeof(double) * columns);
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}
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// return the pointer to the allocated memory
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return matrix;
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}
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void matrix_fill(Matrix* matrix, double value) {
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// simple for loop to populate the 2D-array with a value
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for (int i = 0; i < matrix->rows; i++) {
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for (int j = 0; j < matrix->columns; j++) {
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matrix->numbers[i][j] = value;
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}
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}
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}
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void matrix_free(Matrix* matrix) {
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// de-allocate every column
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for (int i = 0; i < matrix->rows; i++) {
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free(matrix->numbers[i]);
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}
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// de-allocate the rows
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free(matrix->numbers);
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// de-allocate the matrix
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free(matrix);
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}
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void matrix_print(Matrix *matrix) {
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// print the dimensions of the matrix
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printf("Rows: %d, Columns: %d", matrix->rows, matrix->columns);
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// loop through all values and format them into the correct matrix representation
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for (int i = 0; i < matrix->rows; i++) {
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for (int j = 0; j < matrix->columns; j++) {
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printf("%lf ", matrix->numbers[i][j]);
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}
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printf("\n");
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}
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}
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Matrix* matrix_copy(Matrix *matrix) {
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// create another matrix of the same size
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Matrix* copy_of_matrix = matrix_create(matrix->rows, matrix->columns);
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// copy the values from the original matrix into the copy
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for (int i = 0; i < matrix->rows; i++) {
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for (int j = 0; j < matrix->columns; j++) {
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copy_of_matrix->numbers[i][j] = matrix->numbers[i][j];
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}
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}
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// return the pointer to the copy
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return copy_of_matrix;
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}
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