How Can I Ensure Floating-Point Division When Calculating Velocity with Integer Inputs?

Floating Point Division in Integer Calculations

In Bruce Eckels' velocity calculation exercise, the formula is given as v = s / t, where both s and t are integers. This can lead to integer division, resulting in an integer value for v. To obtain a float value for v, the division operation must be adjusted.

One effective approach is to cast one of the operands to a float before performing the division. In Java, this can be achieved with the following syntax:

v = (float)s / t;

By casting s to a float, the compiler will automatically cast t to a float as well, ensuring a floating-point division operation. This will produce a float value for v.

Here's an example that demonstrates this:

class CalcV {
  float v;
  float calcV(int s, int t) {
    v = (float)s / t;
    return v;
  } //end calcV
}

public class PassObject {

  public static void main (String[] args ) {
    int distance = 4;
    int t = 3;
    float outV = new CalcV().calcV(distance, t);
    System.out.println("velocity : " + outV);
  } //end main
}//end class

In this example, the cast to float ensures that the division produces a float value, which is then stored in the v variable.

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