跨列交换矩阵中第一个和最后一个元素的 Java 程序
原文:https://www . geesforgeks . org/Java-程序到交换-跨列矩阵中第一个和最后一个元素/
对于给定的 4 x 4 矩阵，任务是交换第一列和最后一列的元素，然后返回结果矩阵。
示例:
Input 1 : 1 1 5 0
2 3 7 2
8 9 1 3
6 7 8 2
Output 1 : 0 1 5 1
2 3 7 2
3 9 1 8
2 7 8 6
Input 2 : 7 8 9 10
11 13 14 1
15 7 12 22
11 21 30 1
Output 2 : 10 8 9 7
1 13 14 11
22 7 12 15
1 21 30 11
进场:
为了获得所需的输出，我们需要交换所述矩阵的第一列和最后一列的元素。
例
Java 语言(一种计算机语言，尤用于创建网站)
// Java Program to Interchange Elements of the
// First and Last Column in a Matrix
// Importing input output classes
import java.io.*;
class GFG {
// Declare static variable and initialize to
// order of the matrix
static int N = 3;
// Method 1
// To swap first and last column in a matrix
static void Swap_First_Last(int mat[][])
{
int cls = N;
// Interchanging of elements between the
// first and last columns
for (int j = 0; j < N; j++) {
int temp = mat[j][0];
mat[j][0] = mat[j][N - 1];
mat[j][N - 1] = temp;
}
}
// Method 2
// Main driver method
public static void main(String[] args)
{
// Creating 2D integer element matrix
// Custom input matrix
int mat[][]
= { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };
// Outer loop for rows
for (int j = 0; j < N; j++) {
// Inner loop for columns
for (int k = 0; k < N; k++) {
// Print the input matrix
System.out.print(mat[j][k] + " ");
}
// Operations over a row is computed so new line
System.out.println();
}
System.out.println("Swapped Matrix as follows : ");
// Now, calling the (Method1) to interchange
// first and last columns in above matrix
Swap_First_Last(mat);
// Now simply print the updated matrix
// Swapped matrix using nested for loops
// Outer loop for rows
for (int j = 0; j < N; j++) {
// Inner loop for columns
for (int k = 0; k < N; k++)
// Print the swapped matrix
System.out.print(mat[j][k] + " ");
// Operations over a row is computed so new line
System.out.println();
}
}
}
Output
1 2 3
4 5 6
7 8 9
Swapped Matrix as follows :
3 2 1
6 5 4
9 8 7
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