| Directory: | ./ |
|---|---|
| File: | s21_inverse_matrix.c |
| Date: | 2025-08-15 23:01:21 |
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| Lines: | 16 | 16 | 100.0% |
| Branches: | 10 | 10 | 100.0% |
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| 1 | #include "s21_matrix.h" | ||
| 2 | |||
| 3 | 18 | int s21_inverse_matrix(matrix_t *A, matrix_t *result) { | |
| 4 |
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18 | if (s21_check_matrix_is_invalid(A) || result == NULL) { |
| 5 | 4 | return ERROR; | |
| 6 | } | ||
| 7 | |||
| 8 | 14 | int code = OK; | |
| 9 | double det; | ||
| 10 | 14 | s21_determinant(A, &det); | |
| 11 |
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14 | if (A->columns == A->rows && !s21_are_doubles_equal(det, 0)) { |
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10 | if (A->columns == 1) { |
| 13 | 2 | s21_create_matrix(A->rows, A->columns, result); | |
| 14 | 2 | result->matrix[0][0] = 1.0 / A->matrix[0][0]; | |
| 15 | } else { | ||
| 16 | matrix_t temp1; | ||
| 17 | matrix_t temp2; | ||
| 18 | |||
| 19 | 8 | s21_calc_complements(A, &temp1); | |
| 20 | 8 | s21_transpose(&temp1, &temp2); | |
| 21 | 8 | s21_mult_number(&temp2, 1.0 / det, result); | |
| 22 | |||
| 23 | 8 | s21_remove_matrix(&temp1); | |
| 24 | 8 | s21_remove_matrix(&temp2); | |
| 25 | } | ||
| 26 | } else { | ||
| 27 | 4 | code = CALC_ERROR; | |
| 28 | } | ||
| 29 | |||
| 30 | 14 | return code; | |
| 31 | } | ||
| 32 |