用java编写两个矩阵相乘

package D7Z;

import java.util.Scanner;

public class Matrix {

public static double[][] multiplyMatrix(double[][] a,double[][] b){

if(a[0].length!=b.length){

System.out.println("第一个矩阵的列不等于第二个矩阵的行！无法进行矩阵相乘运算！");

return null;

}else{

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

for(int i=0;i<a.length;i++){

for(int j=0;j<b[0].length;j++)

for(int t=0;t<a[0].length;t++)

{

c[i][j]+=a[i][t]*b[t][j];

}

System.out.println();

}

return c;

}

}

public static void displayMatrix(double[][] a){

for(int i=0;i<a.length;i++){

for(int j=0;j<a[i].length;j++){

System.out.print(a[i][j]);

System.out.print("\t");

}

System.out.println();

}

}

public static double[][] createMatrix(){

Scanner input=new Scanner(System.in);

System.out.println("请输入您要输入的矩阵的行");

int m= input.nextInt();

System.out.println("请输入您要输入的矩阵的列");

int n=input.nextInt();

double[][] x=new double[m]
;

System.out.println("请输入您的矩阵");

for(int i=0;i<m;i++)

for(int j=0;j<n;j++)

x[i][j]=input.nextDouble();

return x;

}

public static void main(String[] args){

int m=0,n=0,k=0;

double[][] a=new double[m]
;

double[][] b=new double
[k];

double[][] c=new double[m][k];

a=createMatrix();

b=createMatrix();

c= multiplyMatrix(a,b);

System.out.println("a矩阵");

displayMatrix(a);

System.out.println("b矩阵");

displayMatrix(b);

System.out.println("两个矩阵相乘得：");

displayMatrix(c);

}
}