java基础、矩阵乘法

import java.util.Scanner;
public class Exam2_2 {
	public static void main(String[] args) {
		System.out.println("请输入第一个矩阵的行数和列数,矩阵");
		int a[][] = InputArray();
		System.out.println("请输入第二个矩阵的行数和列数,矩阵");
		int b[][] = InputArray();
		int c[][]=MatrixMulti(a,b);
		PrintMatrix(c);

	}

	public static int[][] InputArray() {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		int tmp[][] = new int[a][b];
		for (int i = 0; i < a; i++)
			for (int j = 0; j < b; j++)
				tmp[i][j] = sc.nextInt();
		return tmp;

	}

	public static int[][] MatrixMulti(int a[][], int b[][]) {
		int tmp[][] = new int[a.length][b[0].length];
		for (int i = 0; i < a.length; i++) {
			for (int j = 0; j < b[0].length; j++) {
				tmp[i][j]=0;
				for(int k=0;k<a[0].length;k++)
					tmp[i][j]+=a[i][k]*b[k][j];
			}
		}
		return tmp;

	}
	public static void PrintMatrix(int a[][])
	{
		for(int i=0;i<a.length;i++){
			for(int j=0;j<a[0].length;j++)
				System.out.print(a[i][j]+" ");
			System.out.println();
		}
			
	}

}