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                # 程序檢查矩陣是否對稱 > 原文: [https://www.geeksforgeeks.org/program-to-check-if-a-matrix-is-symmetric/](https://www.geeksforgeeks.org/program-to-check-if-a-matrix-is-symmetric/) 如果矩陣的轉置與給定矩陣相同,則稱方矩陣為**對稱矩陣**。 **對稱矩陣**可以通過將行更改為列,將列更改為行來獲得。 例子: ``` Input : 1 2 3 2 1 4 3 4 3 Output : Yes Input : 3 5 8 3 4 7 8 5 3 Output : No ``` 一個**簡單解決方案**要執行以下操作。 1)創建給定矩陣的轉置。 2)檢查轉置矩陣和給定矩陣是否相同, ## C++ ```cpp // Simple c++ code for check a matrix is // symmetric or not. #include <iostream> using namespace std; const int MAX = 100; // Fills transpose of mat[N][N] in tr[N][N] void transpose(int mat[][MAX], int tr[][MAX], int N) { ????for (int i = 0; i < N; i++) ????????for (int j = 0; j < N; j++) ????????????tr[i][j] = mat[j][i]; } // Returns true if mat[N][N] is symmetric, else false bool isSymmetric(int mat[][MAX], int N) { ????int tr[N][MAX]; ????transpose(mat, tr, N); ????for (int i = 0; i < N; i++) ????????for (int j = 0; j < N; j++) ????????????if (mat[i][j] != tr[i][j]) ????????????????return false; ????return true; } // Driver code int main() { ????int mat[][MAX] = { { 1, 3, 5 }, ???????????????????????{ 3, 2, 4 }, ???????????????????????{ 5, 4, 1 } }; ????if (isSymmetric(mat, 3)) ????????cout << "Yes"; ????else ????????cout << "No"; ????return 0; } ```
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