tcc/ASP.NET/Controllers/SimulationController.cs

using Microsoft.AspNetCore.Mvc;
using TCC.Services;

namespace TCC.Controllers
{
    [ApiController]
    [Route("simulation")]
    public class SimulationController : ControllerBase
    {
        public SimulationController()
        {
        }

        [HttpGet("harmonic-progression")]
        public async Task<IActionResult> GetHarmonicProgression([FromQuery] int n)
        {
            float sum = 0;
            for (int i = 1; i <= n; i++)
            {
                sum += 1.0f / i;
            }

            return Ok(sum);
        }

        [HttpGet("json")]
        public async Task<IActionResult> GetHarmonicProgression([FromQuery] int n)
        {
            return Ok(new { message = "Hello World!" });
        }
    }
}