条件文での表示
Corresponding if-statement
条件をすべて列挙
Listing all the conditions
if(A == 1 && C == 0 || C == 0 && D == 0 && B == 1 ||
A == 1 && B == 1 && C == 1 && D == 0)
図を描かずに式を書くのは困難
Difficult without a Karnaugh map