# 二維數組中的按行排序 > 原文： [https://www.geeksforgeeks.org/row-wise-sorting-2d-array/](https://www.geeksforgeeks.org/row-wise-sorting-2d-array/) 給定一個 2D 數組，對該數組的每一行進行排序并打印結果。 **示例**： ``` Input : 77 11 22 3 11 89 1 12 32 11 56 7 11 22 44 33 Output : 3 11 22 77 1 11 12 89 7 11 32 56 11 22 33 44 Input : 8 6 4 5 3 5 2 1 9 7 4 2 7 8 9 5 Output : 4 5 6 8 1 2 3 5 2 4 7 9 5 7 8 9 ``` **方法 1（使用冒泡排序）** 開始遍歷給定 2D 數組的每一行，并使用有效的排序算法對每一行的元素進行排序。 ## Java ```java // Java code to sort 2D matrix row-wise import java.io.*; public class Sort2DMatrix { ????static int sortRowWise(int m[][]) ????{ ????????// loop for rows of matrix ????????for (int i = 0; i < m.length; i++) { ????????????// loop for column of matrix ????????????for (int j = 0; j < m[i].length; j++) { ????????????????// loop for comparison and swapping ????????????????for (int k = 0; k < m[i].length - j - 1; k++) { ????????????????????if (m[i][k] > m[i][k + 1]) { ????????????????????????// swapping of elements ????????????????????????int t = m[i][k]; ????????????????????????m[i][k] = m[i][k + 1]; ????????????????????????m[i][k + 1] = t; ????????????????????} ????????????????} ????????????} ????????} ????????// printing the sorted matrix ????????for (int i = 0; i < m.length; i++) { ????????????for (int j = 0; j < m[i].length; j++) ????????????????System.out.print(m[i][j] + " "); ????????????System.out.println(); ????????} ????????return 0; ????} ????// driver code ????public static void main(String args[]) ????{ ????????int m[][] = { { 9, 8, 7, 1 }, ??????????????????????{ 7, 3, 0, 2 }, ??????????????????????{ 9, 5, 3, 2 }, ??????????????????????{ 6, 3, 1, 2 } }; ????????sortRowWise(m); ????} } ``` ## Python3 ```py # Python3 code to sort 2D matrix row-wise def sortRowWise(m): ????# loop for rows of matrix ????for i in range(len(m)): ????????# loop for column of matrix ????????for j in range(len(m[i])): ????????????# loop for comparison and swapping ????????????for k in range(len(m[i]) - j - 1): ????????????????if (m[i][k] > m[i][k + 1]): ????????????????????# swapping of elements ????????????????????t = m[i][k] ????????????????????m[i][k] = m[i][k + 1] ????????????????????m[i][k + 1] = t ????# printing the sorted matrix ????for i in range(len(m)): ????????for j in range(len(m[i])): ????????????print(m[i][j], end=" ") ????????print() # Driver code m = [[9, 8, 7, 1 ],[7, 3, 0, 2],[9, 5, 3, 2],[ 6, 3, 1, 2 ]] sortRowWise(m) # This code is contributed by shubhamsingh10 ``` ## C# ```cs // C# code to sort 2D matrix row-wise using System; class GFG? { static int sortRowWise(int [,]m) { ????// loop for rows of matrix ????for (int i = 0;? ?????????????i < m.GetLength(0); i++) ????{ ????????// loop for column of matrix ????????for (int j = 0;? ?????????????????j < m.GetLength(1); j++)? ????????{ ????????????// loop for comparison and swapping ????????????for (int k = 0;? ?????????????????????k < m.GetLength(1) - j - 1; k++)? ????????????{ ????????????????if (m[i, k] > m[i, k + 1])? ????????????????{ ????????????????????// swapping of elements ????????????????????int t = m[i, k]; ????????????????????m[i, k] = m[i, k + 1]; ????????????????????m[i, k + 1] = t; ????????????????} ????????????} ????????} ????} ????// printing the sorted matrix ????for (int i = 0; ?????????????i < m.GetLength(0); i++)? ????{ ????????for (int j = 0; ?????????????????j < m.GetLength(1); j++) ????????????Console.Write(m[i, j] + " "); ????????Console.WriteLine(); ????} ????return 0; } // Driver Code public static void Main(String []args) { ????int [,]m = {{ 9, 8, 7, 1 }, ????????????????{ 7, 3, 0, 2 }, ????????????????{ 9, 5, 3, 2 }, ????????????????{ 6, 3, 1, 2 }}; ????sortRowWise(m); } } // This code is contributed by 29AjayKumar ``` **輸出**： ``` 1 7 8 9 0 2 3 7 2 3 5 9 1 2 3 6 ``` **方法 2（使用庫函數）** 想法是對矩陣的每一行使用 [Arrays.sort（）](https://www.geeksforgeeks.org/arrays-sort-in-java-with-examples/)。 ## Java ```java // Java code to sort 2D matrix row-wise import java.io.*; import java.util.Arrays; public class Sort2DMatrix { ????static int sortRowWise(int m[][]) ????{ ????????// One by one sort individual rows. ????????for (int i = 0; i < m.length; i++) ????????????Arrays.sort(m[i]); ????????// printing the sorted matrix ????????for (int i = 0; i < m.length; i++) { ????????????for (int j = 0; j < m[i].length; j++) ????????????????System.out.print(m[i][j] + " "); ????????????System.out.println(); ????????} ????????return 0; ????} ????// driver code ????public static void main(String args[]) ????{ ????????int m[][] = { { 9, 8, 7, 1 }, ??????????????????????{ 7, 3, 0, 2 }, ??????????????????????{ 9, 5, 3, 2 }, ??????????????????????{ 6, 3, 1, 2 } }; ????????sortRowWise(m); ????} } ``` ## Python3 ```py # Python3 code to sort 2D matrix row-wise def sortRowWise(m): ????# One by one sort individual rows. ????for i in range(len(m)):? ????????m[i].sort() ????# printing the sorted matrix ????for i in range(len(m)): ????????for j in range(len(m[i])): ????????????print(m[i][j], end=" ") ????????print() ????return 0 # Driver code m = [[9, 8, 7, 1 ],[7, 3, 0, 2],[9, 5, 3, 2 ],[ 6, 3, 1, 2]] sortRowWise(m) # This code is contributed by shubhamsingh10 ``` Output ``` 1 7 8 9 0 2 3 7 2 3 5 9 1 2 3 6 ``` * * * * * *