// error_demo1.java
public class error_demo1
{
  public error_demo1()
  {
    float v[] = new float[3];
    float ans = 0.0f;
    int i;

    System.out.println("error_demo1.java 1.0e-7");
    v[0] = 1.0f;
    v[1] = 1.0e-7f;
    v[2] = -1.0f;
    for(i=0; i<3; i++){
      ans = ans + v[i];
    }
    ans = 1.0e10f * ans;
    System.out.println("ans= "+ans);

    System.out.println("error_demo1.java 0.5e-7");
    v[1] = 0.5e-7f;
    ans = 0.0f;
    for(i=0; i<3; i++){
      ans = ans + v[i];
    }
    ans = 1.0e10f * ans;
    System.out.println("ans= "+ans);
    System.out.println("expression ans="+(1.0e10f*((1.0f+1.0e-7f)-1.0f)));
  }

  public static void main (String[] args)
  {
    new error_demo1();
  }
}