matrix_multiplication.cpp

// C++ program to multiply two matrices 

#include <bits/stdc++.h> 
using namespace std; 

// Edit MACROs here, according to your Matrix Dimensions for 
// mat1[R1][C1] and mat2[R2][C2] 
#define R1 2 // number of rows in Matrix-1 
#define C1 2 // number of columns in Matrix-1 
#define R2 2 // number of rows in Matrix-2 
#define C2 2 // number of columns in Matrix-2 

void mulMat(int mat1[][C1], int mat2[][C2]) 
{ 
	int rslt[R1][C2]; 

	cout << "Multiplication of given two matrices is:\n"; 

	for (int i = 0; i < R1; i++) { 
		for (int j = 0; j < C2; j++) { 
			rslt[i][j] = 0; 

			for (int k = 0; k < R2; k++) { 
				rslt[i][j] += mat1[i][k] * mat2[k][j]; 
			} 

			cout << rslt[i][j] << "\t"; 
		} 

		cout << endl; 
	} 
} 

// Driver code 
int main() 
{ 
	// R1 = 4, C1 = 4 and R2 = 4, C2 = 4 (Update these 
	// values in MACROs) 
	int mat1[R1][C1] = { { 1, 1 }, 
						{ 2, 2 } }; 

	int mat2[R2][C2] = { { 1, 1 }, 
						{ 2, 2 } }; 

	if (C1 != R2) { 
		cout << "The number of columns in Matrix-1 must "
				"be equal to the number of rows in "
				"Matrix-2"
			<< endl; 
		cout << "Please update MACROs according to your "
				"array dimension in #define section"
			<< endl; 

		exit(EXIT_FAILURE); 
	} 

	// Function call 
	mulMat(mat1, mat2); 

	return 0; 
}