# 將矩陣元素逐行移動 k > 原文： [https://www.geeksforgeeks.org/shift-matrix-elements-k/](https://www.geeksforgeeks.org/shift-matrix-elements-k/) 給定方陣 **mat [] []** 和數字 **k** 。 任務是在矩陣的右側移動每行的前 k 個元素。 **示例**： ``` Input : mat[N][N] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}} k = 2 Output :mat[N][N] = {{3, 1, 2} {6, 4, 5} {9, 7, 8}} Input : mat[N][N] = {{1, 2, 3, 4} {5, 6, 7, 8} {9, 10, 11, 12} {13, 14, 15, 16}} k = 2 Output :mat[N][N] = {{3, 4, 1, 2} {7, 8, 5, 6} {11, 12, 9, 10} {15, 16, 13, 14}} Note: Matrix should be a square matrix ``` ## C++ ```cpp // C++ program to shift k elements in a matrix. #include <bits/stdc++.h> using namespace std; #define N 4 // Function to shift first k elements of? // each row of matrix. void shiftMatrixByK(int mat[N][N], int k) { ????if (k > N) { ????????cout << "shifting is not possible" << endl; ????????return; ????} ????int j = 0; ????while (j < N) { ????????// Print elements from index k ????????for (int i = k; i < N; i++) ????????????cout << mat[j][i] << " "; ????????// Print elements before index k ????????for (int i = 0; i < k; i++) ????????????cout << mat[j][i] << " "; ????????cout << endl; ????????j++; ????} } // Driver code int main() { ????int mat[N][N] = {{1, 2, 3, 4}, ?????????????????????{5, 6, 7, 8}, ?????????????????????{9, 10, 11, 12}, ?????????????????????{13, 14, 15, 16}}; ????int k = 2; ????// Function call ????shiftMatrixByK(mat, k); ????return 0; } ``` ## Java ```java // Java program to shift k elements in a? // matrix. import java.io.*; import java.util.*; public class GFG { ????static int N = 4; ????// Function to shift first k elements? ????// of each row of matrix. ????static void shiftMatrixByK(int [][]mat, ????????????????????????????????????int k) ????{ ????????if (k > N) { ????????????System.out.print("Shifting is" ????????????????????????+ " not possible"); ????????????return; ????????} ????????int j = 0; ????????while (j < N) { ????????????// Print elements from index k ????????????for (int i = k; i < N; i++) ????????????????System.out.print(mat[j][i] + " "); ????????????// Print elements before index k ????????????for (int i = 0; i < k; i++) ????????????????System.out.print(mat[j][i] + " "); ????????????System.out.println(); ????????????j++; ????????} ????} ????// Driver code ????public static void main(String args[]) ????{ ????????int [][]mat = new int [][] ????????????????????{ {1, 2, 3, 4}, ??????????????????????{5, 6, 7, 8}, ??????????????????????{9, 10, 11, 12}, ??????????????????????{13, 14, 15, 16} }; ????????int k = 2; ????????// Function call ????????shiftMatrixByK(mat, k); ????} } // This code is contributed by Manish Shaw? // (manishshaw1) ``` ## Python3 ```py # Python3 program to shift k? # elements in a matrix. N = 4 # Function to shift first k? # elements of each row of? # matrix. def shiftMatrixByK(mat, k): ????if (k > N) : ????????print ("shifting is" ????????????" not possible") ????????return ????j = 0 ????while (j < N) : ????????# Print elements from ????????# index k ????????for i in range(k, N): ????????????print ("{} " .? ????????????format(mat[j][i]), end="") ????????# Print elements before ????????# index k ????????for i in range(0, k): ????????????print ("{} " .? ????????????format(mat[j][i]), end="") ????????print ("") ????????j = j + 1 # Driver code mat = [[1, 2, 3, 4], ???????[5, 6, 7, 8], ???????[9, 10, 11, 12], ???????[13, 14, 15, 16]] k = 2 # Function call shiftMatrixByK(mat, k) # This code is contributed by? # Manish Shaw (manishshaw1) ``` ## C# ```cs // C# program to shift k elements in a? // matrix. using System; class GFG { ????static int N = 4; ????// Function to shift first k elements? ????// of each row of matrix. ????static void shiftMatrixByK(int [,]mat, ????????????????????????????????????int k) ????{ ????????if (k > N) { ????????????Console.WriteLine("shifting is" ????????????????????????+ " not possible"); ????????????return; ????????} ????????int j = 0; ????????while (j < N) { ????????????// Print elements from index k ????????????for (int i = k; i < N; i++) ????????????????Console.Write(mat[j,i] + " "); ????????????// Print elements before index k ????????????for (int i = 0; i < k; i++) ????????????????Console.Write(mat[j,i] + " "); ????????????Console.WriteLine(); ????????????j++; ????????} ????} ????// Driver code ????public static void Main() ????{ ????????int [,]mat = new int [,] ????????????????????{ {1, 2, 3, 4}, ??????????????????????{5, 6, 7, 8}, ??????????????????????{9, 10, 11, 12}, ??????????????????????{13, 14, 15, 16} }; ????????int k = 2; ????????// Function call ????????shiftMatrixByK(mat, k); ????} } // This code is contributed by Manish Shaw? // (manishshaw1) ``` ## PHP ```php <?php // PHP program to shift k? // elements in a matrix. // Function to shift first k? // elements of each row of matrix. function shiftMatrixByK($mat, $k) { ????$N = 4; ????if ($k > $N)? ????{ ????????echo ("shifting is not possible\n"); ????????return; ????} ????$j = 0; ????while ($j < $N)? ????{ ????????// Print elements from index k ????????for ($i = $k; $i < $N; $i++) ????????????echo ($mat[$j][$i]." "); ????????// Print elements before index k ????????for ($i = 0; $i < $k; $i++) ????????????echo ($mat[$j][$i]." "); ????????echo ("\n"); ????????$j++; ????} } // Driver code $mat = array(array(1, 2, 3, 4), ?????????????array(5, 6, 7, 8), ?????????????array(9, 10, 11, 12), ?????????????array(13, 14, 15, 16)); $k = 2; // Function call shiftMatrixByK($mat, $k); // This code is contributed by? // Manish Shaw(manishshaw1) ?> ``` **輸出**： ``` 3 4 1 2 7 8 5 6 11 12 9 10 15 16 13 14 ``` * * * * * *