Given two matrix A[][] and B[][] of same order m*n. The task is to find the intersection of both matrix as C, where: 

• C_ij = A_ij if A_ij = B_ij
• C = “*”, otherwise.

_Examples:  

Input : 
A[N][N] = {{2, 4, 6, 8},
           {1, 3, 5, 7},
           {8, 6, 4, 2},
           {7, 5, 3, 1}};

B[N][N] = {{0, 4, 3, 8},
           {1, 3, 5, 7},
           {8, 3, 6, 2},
           {4, 5, 3, 4}};
Output :
* 4 * 8 
1 3 5 7 
8 * * 2 
* 5 3 * 

As intersection of two set is a set which includes common elements to both set, similarly intersection of two matrix will include only corresponding common element and place “*” at the position of rest unmatching elements. 
For finding the intersection of both matrix simply iterate over their size and print * if element at particular position in both matrix are not equal else print the element.
Below is the implementation of the above approach: 

Python3

# Python 3 program to find intersection
# of two matrices
N, M = 4, 4

# Function to print the resultant matrix
def printIntersection(A, B) :

	for i in range(M) :
		for j in range(N) :

			# print element value for equal
			# elements else *
			if (A[i][j] == B[i][j]) :
				print(A[i][j], end = " ")
			else :
				print("* ", end = " ")
		
		print()
		
# Driver Code
if __name__ == "__main__" :
	
	A = [ [2, 4, 6, 8 ],
		[ 1, 3, 5, 7 ],
		[ 8, 6, 4, 2 ],
		[ 7, 5, 3, 1 ] ]
		
	B = [ [ 2, 3, 6, 8 ],
		[ 1, 3, 5, 2 ],
		[ 8, 1, 4, 2 ],
		[ 3, 5, 4, 1 ] ]

	printIntersection(A, B)

# This code is contributed by Ryuga

Output: 

2 * 6 8 
1 3 5 * 
8 * 4 2 
* 5 * 1