public class MyClass {
public static final int COLS1 = 3;
public static final int COLS2 = 2;
public static void main(String args[]) {
int[][] matrix1 = {
{4, 2, 4},
{8, 3, 1}
};
int[][] matrix2 = {
{3, 5},
{2, 8},
{7, 9}
};
int[][] mul = {
{0, 0},
{0, 0}
};
int rows1 = matrix1.length;
int cols2 = matrix2[0].length;
// mul[0][0] = m1[0][0] * m2[0][0] + m1[0][1] * m2[1][0] + m1[0][2] * m2[2][0]
for (int i = 0; i < rows1; i++) {
for (int j = 0; j < cols2; j++) {
for (int k = 0; k < COLS1; k++) {
mul[i][j] += matrix1[i][k] * matrix2[k][j];
System.out.print("mul[" + i);
System.out.print("][" + j);
System.out.print("] += m1[" + i);
System.out.print("][" + k);
System.out.print("] * m2[" + k);
System.out.print("][" + j + "]\n");
}
System.out.print("\n");
}
}
for (int i = 0; i < COLS2; i++) {
for (int j = 0; j < COLS2; j++) {
System.out.print(mul[i][j] + " ");
}
System.out.print("\n");
}
}
}
/*
run:
mul[0][0] += m1[0][0] * m2[0][0]
mul[0][0] += m1[0][1] * m2[1][0]
mul[0][0] += m1[0][2] * m2[2][0]
mul[0][1] += m1[0][0] * m2[0][1]
mul[0][1] += m1[0][1] * m2[1][1]
mul[0][1] += m1[0][2] * m2[2][1]
mul[1][0] += m1[1][0] * m2[0][0]
mul[1][0] += m1[1][1] * m2[1][0]
mul[1][0] += m1[1][2] * m2[2][0]
mul[1][1] += m1[1][0] * m2[0][1]
mul[1][1] += m1[1][1] * m2[1][1]
mul[1][1] += m1[1][2] * m2[2][1]
44 72
37 73
*/
