Java——矩阵的乘积和点乘

public class C{
          
   
	public static void main(String[] args) {
          
   
		int M=3;
		int m[][]=new int [M][M];
			System.out.println("矩阵A为：");
			for(int i=0;i<m.length;i++) {
          
   
				for(int j=0;j<m[0].length;j++) {
          
   
					m[i][j]= (int)i*j;
					System.out.print(m[i][j]+" ");
				}
				System.out.println(); 
		    }
			int N=3;
			int n[][]=new int [N][N];
			System.out.println("矩阵B为：");
			for(int i=0;i<n.length;i++) {
          
   
				for(int j=0;j<n[0].length;j++) {
          
   
					n[i][j]= (int)2*i*j;
					System.out.print(n[i][j]+" ");
				}
				System.out.println(); 
			}
			int P=3;
			int p[][]=new int[P][P];
			System.out.println("矩阵的乘积A*B为：");
		    for(int i = 0;i<m.length;i++){
          
   
		    	for(int j = 0;j<m.length;j++){
          
   
		    		for(int k = 0;k<m.length;k++){
          
   
		    			p[i][j] += m[i][k]*n[k][j];
					}
		    		System.out.print(p[i][j]+" ");
			    }
		    	System.out.println(); 
			}
		    int Q=3;
			int q[][]=new int[Q][Q];
			System.out.println("矩阵的点乘A.*B为：");
		    for(int i = 0;i<m.length;i++){
          
   
		    	for(int j = 0;j<m.length;j++){
          
   
		    		q[i][j]= m[i][j]*n[i][j];
		    		System.out.print(q[i][j]+" ");
			    }
		    	System.out.println(); 
			}
	}
}