将矩阵元素逐行移动 k · GeeksForGeeks 中文系列教程

# 将矩阵元素逐行移动 k > 原文： [https://www.geeksforgeeks.org/shift-matrix-elements-k/](https://www.geeksforgeeks.org/shift-matrix-elements-k/) 给定方阵 **mat [] []** 和数字 **k** 。任务是在矩阵的右侧移动每行的前 k 个元素。 **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) ?> ``` **输出**： ``` 3 4 1 2 7 8 5 6 11 12 9 10 15 16 13 14 ``` * * * * * *