Calculator.java

/* a simple arithmetic calculator. */

class Calculator{
  
  public Calculator(){
    
  }
  
  public int add(int a, int b){
    
    return a+b;
  }
  
  public int subtract(int a, int b){
    
    return a-b;
  }
  
  public int multiply(int a, int b){
    
    return a*b;
  }
  
  public int divide(int a, int b){
    
    if(b == 0){
       System.out.println("Error! Dividing by zero is not allowed.");
      return 0;
    }else{
      
      return a/b;
    }
    
    
  }
  
  public int modulo(int a, int b){
    
    if(b == 0){
       System.out.println("Error! Dividing by zero is not allowed.");
      return 0;
    }else{
      
      return a%b;
    }
    
    
  }
  
  
  public static void main(String[] args){
    Calculator myCalculator = new Calculator();
    System.out.println(myCalculator.add(5, 7));
    System.out.println(myCalculator.subtract(45, 11));
  
  }
    
  
}