import com.alexiusacademia.hydraulics.TrapezoidalOpenChannel;

public class TrapezoidalChannel {
  public static void main(String[] args) {
    // Create an instance of the class with a given unknown, Discharge
    TrapezoidalOpenChannel channel = new TrapezoidalOpenChannel(TrapezoidalOpenChannel.Unknown.DISCHARGE);

    // Setting the properties required
    // If some required properties are not set, getErrMessage will return a null message.
    toc.setBedSlope(bedSlope);
    toc.setBaseWidth(baseWidth);
    toc.setWaterDepth(waterDepth);
    toc.setSideSlope(sideSlope);
    toc.setManningRoughness(manning);

    if (toc.analyze()) {
      printLine("Analysis");
      printLine("Discharge = " + toc.getDischarge());
      printLine("Average velocity = " + toc.getAverageVelocity());
      printLine("Wetted area = " + toc.getWettedArea());
      printDash();
      printLine("Critical depth = " + toc.getCriticalDepth());
      printLine("Froude number = " + toc.getFroudeNumber());
      printLine("Flow Type = " + toc.getFlowType());
      printLine("Critical Slope = " + toc.getCriticalSlope());
    } else {
      printLine("An error has occurred: " + toc.getErrMessage());
    }
  }

  private static void printLine(String s) {
    System.out.println(s);
  }


  private static void printDash() {
    printLine("= = = = = = = = = = =");
  }
}

// Start of output
Circular open channel
= = = = = = = = = = = = = =
Discharge = 0.687263130787826
Water depth = 0.7
Wetted perimeter = 2.085893287217503
Critical depth = 0.44559999999996724
Froude number = 0.42106818161340415
Critical slope = 0.004793932865164748
// End of output