矩阵和逆矩阵相乘得一

main.cpp

@@ -28,6 +28,20 @@ int main() {
 	GMatrix M2 = Transpose(M1);
 	cout << M2 << endl;
 
-	cout << M1 * M2 << endl;
+	cout << Det(M1) * Det(M2) << endl;
+
+	float a[] = {
+		1, 2, 3,
+		3, 1, 2,
+		2, 3, 1
+	};
+	GMatrix M3(3, 3, a);
+	
+	GMatrix M4 = Inverse(M3);
+
+	cout << M3 << endl;
+	cout << M4 << endl;
+
+	cout << Det(M3) * Det(M4) << endl;
   	return 0;
 }