int A = 18;
int B = -5;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);

  Serial.print("Koordinat yang dimasukkan: (");
  Serial.print(A);
  Serial.print(", ");
  Serial.print(B);
  Serial.println(")");
   
   if (A > 0 && B > 0) {
    Serial.println("Kuadran 1 (A, B)");
  } else if (A < 0 && B > 0) {
    Serial.println("Kuadran 2 (-A, B)");
  } else if (A < 0 && B < 0) {
    Serial.println("Kuadran 3 (-A, -B)");
  } else if (A > 0 && B < 0) {
    Serial.println("Kuadran 4 (A, -B)");
  } 
   
}


void loop() {
  // put your main code here, to run repeatedly:

}