matrixmultiply.java

java程序设计源代码

public class MatrixMultiply{
	public static void main( String args[ ] ){
		int i,j,k;
		int a[ ][ ]={ {2,3,5}, {1,3,7} };
		int b[ ][ ]={ {1,5,2,8},{5,9,10,-3},{2,7,-5,-18} };
		int c[ ][ ]=new int[2][4];
		for( i=0; i<2; i++ ){
			for( j=0; j<4; j++ ){
				c[i][j]=0;
				for( k=0; k<3; k++ ){
					c[i][j]+=a[i][k]*b[k][j];
				}
			}
		}
		System.out.println("\n*** Matrix A ***");
		for( i=0; i<2; i++ ){
			for( j=0; j<3; j++ )
				System.out.print(a[i][j]+" ");
			System.out.println();
		}
		System.out.println("\n*** Matrix B ***");
		for( i=0; i<3; i++ ){
			for( j=0; j<4; j++ )
				System.out.print(b[i][j]+" ");
			System.out.println();
		}
		System.out.println("\n*** Matrix C ***");
		for( i=0; i<2; i++ ){
			for( j=0; j<4; j++ )
				System.out.print(c[i][j]+" ");
			System.out.println();
		}
	}
}