matrixmultiply.java

来自「关于一些算法的例子」· Java 代码 · 共 41 行

public class MatrixMultiply{
	public static void main(String args[]){

		int[][] a = {
		{1,2},
		{2,1},
		{0,1}};

		int[][] b = {
			{1,3,5},
			{2,4,6}
		};

		int[][] c = new int[a.length][b[0].length];

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

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

}