Nick knows what this is about.
Questions:
- In the quotient method, how do I get it to return the string "infinity" when the first number is 0?
- Do my loops statements look right?
-In the OperandsDriver class, how do I make sure the user only enters numbers, and if they don't enter numbers, how do I tell them to do so without crashing the app?
- My tester class will also not communicate with my Operands class, making alot of this untestable, so if you could advise why that is happening that would be great.
public class Operands {
private float operand1;
private double operand2;
public Operands(float operand1, double operand2) {
}
public double product() {
double x = 0;
double y = 0;
while (x < operand2) {
y += operand1;
x++;
}
return y;
}
public double quotient() {
double x = 0;
double y = 0;
(String)infinity = "Infinity";
if (operand1 == 0) {
return (String)infinity;
} else if (operand2 > operand1) {
x = 0;
return x;
}
do {
y = operand1 - operand2;
operand1 = (float) y;
x++;
} while (y > operand2);
return x;
}
public double power() {
double y = 0;
for (int i = 1; i < operand2; i++) {
y *= operand1;
}
return y;
}
}
import javax.swing.JOptionPane;
public class OperandsDriver {
public static void main(String[] args) {
String input1 = JOptionPane
.showInputDialog("Please enter the first integer:");
String input2 = JOptionPane
.showInputDialog("Please enter the second integer:");
float operand1 = Float.parseFloat(input1);
double operand2 = Double.parseDouble(input2);
String input3 = JOptionPane
.showInputDialog("Please enter 'p' for product, 'q' for quotient, 'pow' for power or 'y' to quit.");
while (input3 == "q") {
if (input3 == "p") {
Operands p = new Operands(operand1, operand2);
System.out.println("The product of " + operand1 + " and "
+ operand2 + " is " + p.product());
}
else if (input3 == "q") {
Operands q = new Operands(operand1, operand2);
System.out.println("The quotient of " + operand1 + " and "
+ operand2 + " is " + q.quotient());
}
else if (input3 == "pow") {
Operands pow = new Operands(operand1, operand2);
System.out.println("The power of " + operand1 + " and "
+ operand2 + " is " + pow.power());
}
else
{
System.out.println("Bad input.");
return;
}
}
}
}
