SimpleCalculator

void setup() {
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  Serial.println("enter targil:");
  while (Serial.available() == 0);
  int a = Serial.parseInt();
  char ch = Serial.read();
  int b = Serial.parseInt();
  if (ch == '+') {
    Serial.print(a);
    Serial.print(ch);
    Serial.print(b);
    Serial.print("=");
    Serial.println(a + b);
  }
  if (ch == '-') {
    Serial.print(a);
    Serial.print(ch);
    Serial.print(b);
    Serial.print("=");
    Serial.println(a - b);
  }
  if (ch == '*') {
    Serial.print(a);
    Serial.print(ch);
    Serial.print(b);
    Serial.print("=");
    Serial.println(a * b);
  }
  if (ch == '/') {
    Serial.print(a);
    Serial.print(ch);
    Serial.print(b);
    Serial.print("=");
    Serial.println(a / b);
  }
}