接受 M×N 阶矩阵的 Java 程序&交换对角线
原文:https://www . geesforgeks . org/Java-program-to-accept-a-matrix-order-m-x-n-interchange-the-对角线/
问题描述:编写一个 Java 程序，接受一个 M × N 阶的矩阵，然后交换矩阵的对角线。
步骤:
1.我们只能把对角线换成正方形矩阵。
2.创建一个大小为[M × M]的正方形矩阵。
3.检查矩阵是否为正方形矩阵。如果矩阵是正方形的，那么按照步骤 3，否则终止程序。
4.应用逻辑交换矩阵的对角线下面给出了一些逻辑。
方法 1: 互换元素 a[i][i] 和a[I][n–I-1]
for(j = 0；j < m；j++){ 0
temp = a[j][j]；
a[j][j]= a[j][n–1–j]；
a[j][n–1–j]=温度；
}
示例:
Java 语言(一种计算机语言，尤用于创建网站)
// Java Program to Accept a Matrix of Order M x N &
// Interchange the Diagonals
import java.util.Scanner;
public class InterchangeDiagonals {
public static void main(String[] args)
{
// declare variable
int m, n, i, j, temp;
// create a object of scanner class
Scanner sc = new Scanner(System.in);
System.out.print("Enter number of rows ");
// take number of rows
m = sc.nextInt();
System.out.print("Enter number of columns ");
// take number of columns
n = sc.nextInt();
// declare a mxn order array
int a[][] = new int[m][n];
// if block it's execute when m is equals to n
if (m == n) {
System.out.println(
"Enter all the values of matrix ");
// take the matrix inputs
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
a[i][j] = sc.nextInt();
}
}
System.out.println("original Matrix:");
// print the original matrix
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
System.out.print(a[i][j] + " ");
}
System.out.println("");
}
// perform interchange
for (j = 0; j < m; j++) {
temp = a[j][j];
a[j][j] = a[j][n - 1 - j];
a[j][n - 1 - j] = temp;
}
System.out.println(
" after interchanging diagonals of matrix ");
// print interchanged matrix
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
System.out.print(a[i][j] + " ");
}
System.out.println("");
}
}
// else block it's only execute when m is not equals
// to n
else {
System.out.println("Rows not equal to columns");
}
}
}
输出:
输入行数 3
输入列数 3
输入矩阵的所有值
one
Two
three
four
five
six
seven
eight
nine
原始矩阵:
1 2 3
4 5 6
7 8 9
交换矩阵的对角线后
3 2 1
4 5 6
9 8 7
例 2:
Java 语言(一种计算机语言，尤用于创建网站)
// Java Program to Accept a Matrix of Order MxN &
// Interchange the Diagonals
import java.util.Scanner;
public class InterchangeDiagonals {
public static void main(String[] args)
{
// declare variable
int m, n, i, j, temp;
// create a object of scanner class
Scanner sc = new Scanner(System.in);
System.out.print("Enter number of rows ");
// take number of rows
m = sc.nextInt();
System.out.print("Enter number of columns ");
// take number of columns
n = sc.nextInt();
// declare a mxn order array
int a[][] = new int[m][n];
// if block it's execute when m is equals to n
if (m == n) {
System.out.println(
"Enter all the values of matrix ");
// take input matrix
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
a[i][j] = sc.nextInt();
}
}
System.out.println("original Matrix:");
// print original matrix
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
System.out.print(a[i][j] + " ");
}
System.out.println("");
}
// performing interchange
for (j = 0; j < m; j++) {
temp = a[j][j];
a[j][j] = a[j][n - 1 - j];
a[j][n - 1 - j] = temp;
}
System.out.println(
" after interchanging diagonals of matrix ");
// print interchanged matrix
for (i = 0; i < m; i++) {
for (j = 0; j < n; j++) {
System.out.print(a[i][j] + " ");
}
System.out.println("");
}
}
// else block it's only execute when m is not equals
// to n
else {
System.out.println("Rows not equal to columns");
}
}
}
输出:
输入行数 2
输入列数 1
输入矩阵的所有值
one
Two
行不等于列
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