Calculator

Calculator.java

//I accidentally switched up operand and operator, but the program has the same effect
public class Calculator
{
 //instance variables
 private double num1;
 private double num2;
 private char operand;
 
 //default constructor
 public Calculator()
 {
  num1 = 0;
  num2 = 0;
  operand = 0;
 }
 
 //inialization constructor
 public Calculator(double n1, double n2, char op)
 {
  num1 = n1;
  num2 = n2;
  operand = op;
 }
 
 //modifier method for num1
 public void setNum1(double n1)
 {
  num1 = n1;
 }
 
 //modifider method for num2
 public void setNum2(double n2)
 {
  num2 = n2;
 }
 
 //modifier method for operand
 public void setOperand(char op)
 {
  operand = op;
 }
 
 //accessor method for num1
 public double getNum1()
 {
  return num1;
 }
 
 //accessor method for num2
 public double getNum2()
 {
  return num2;
 }
 
 //accessor method for operand
 public char getOp()
 {
  return operand;
 }
 
 //Create method to calculate the result
 public double calculate()
 {
  double ans; //creates the double called ans
  if(operand == '+'){ans = num1 + num2; return ans;} //if +, add and return ans
  else if(operand == '-'){ans = num1 - num2; return ans;} //if -, subtract and return ans
  else if(operand == '*'){ans = num1 * num2; return ans;} // if *, multiply and return ans
  else if(operand == '/'){ans = num1 / num2; return ans;} // if /, divide and return ans
 }

 
 //Create the toString() method
 public String toString()
 {
  return "" + num1 + operand + num2 + " = " + calculate() ; //prints out number one, operand, two, equals, and ans as calculated by calculate()
 } 
}