/// <summary>/// 求一個矩陣的轉置矩陣/// </summary>/// <param name="matrix">矩陣</param>/// <returns>轉置矩陣</returns>private static double[][] MatrixTranspose(double[][] matrix){ //合法性檢查 if (!isMatrix(matrix)) {  throw new Exception("matrix 不是一個矩陣"); } //矩陣中沒有元素的情況 if (matrix.Length == 0) {  return new double[][] { }; } double[][] result = new double[matrix[0].Length][]; for (int i = 0; i < result.Length; i++) {  result[i] = new double[matrix.Length]; } //新矩陣生成規則： b[i,j]=a[j,i] for (int i = 0; i < result.Length; i++) {  for (int j = 0; j < result[0].Length; j++)  {   result[i][j] = matrix[j][i];  } } return result;}

/// <summary>/// 判斷一個二維數組是否為矩陣/// </summary>/// <param name="matrix">二維數組</param>/// <returns>true:是矩陣 false:不是矩陣</returns>private static bool isMatrix(double[][] matrix){ //空矩陣是矩陣 if (matrix.Length < 1) return true; //不同行列數如果不相等，則不是矩陣 int count = matrix[0].Length; for (int i = 1; i < matrix.Length; i++) {  if (matrix[i].Length != count)  {   return false;  } } //各行列數相等，則是矩陣 return true;}/// <summary>/// 打印矩陣/// </summary>/// <param name="matrix">待打印矩陣</param>private static void PrintMatrix(double[][] matrix){ for (int i = 0; i < matrix.Length; i++) {  for (int j = 0; j < matrix[i].Length; j++)  {   Console.Write(matrix[i][j] + "/t");   //注意不能寫為：Console.Write(matrix[i][j] + '/t');  }  Console.WriteLine(); }}

static void Main(string[] args){ double[][] matrix = new double[][]  {  new double[] { 1, 2, 3, 4 },  new double[] { 4, 5, 6, 7 },  new double[] { 7, 8, 9, 10} }; //打印矩陣 PrintMatrix(matrix); Console.WriteLine(); //打印轉置后矩陣 PrintMatrix(MatrixTranspose(matrix)); Console.WriteLine(); Console.ReadLine();}