题解 | 矩阵转置

import java.util.Scanner;

public class Main{

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scanner=new Scanner(System.in);
		int n=scanner.nextInt();
		int m=scanner.nextInt();
		int a[][]=new int[n][m];
		int b[][]=new int[m][n];
		for (int i = 0; i < a.length; i++) {
			for (int j = 0; j < a[0].length; j++) {
				a[i][j]=scanner.nextInt();
				b[j][i]=a[i][j];
			}

		}
		for (int i = 0; i < b.length; i++) {
			for (int j = 0; j < b[0].length; j++) {
				System.out.print(b[i][j]+" ");
			}
			System.out.println();
		}

	}

}

其实只需要将a[i][j]的值赋给b[j][i]即可