23 lines
770 B
C#
23 lines
770 B
C#
namespace Evergreen.Health.Application.Health.Policies;
|
|
|
|
/// <summary>Demo 起点，可由用户手动修改，不是医学或人体工学判断。</summary>
|
|
public static class BmiFirmnessPolicy
|
|
{
|
|
public static decimal? Calculate(decimal? heightCm, decimal? weightKg)
|
|
{
|
|
if (heightCm is null or <= 0 || weightKg is null or <= 0) return null;
|
|
try
|
|
{
|
|
var height = heightCm.Value / 100m;
|
|
return Math.Round(weightKg.Value / (height * height), 1);
|
|
}
|
|
catch (ArithmeticException) { return null; }
|
|
}
|
|
|
|
public static string? Firmness(decimal? bmi) => bmi switch
|
|
{
|
|
< 18.5m => "很软", < 24m => "稍软", < 28m => "稍硬",
|
|
< 32m => "很硬", >= 32m => "最硬", _ => null
|
|
};
|
|
}
|