public IHttpActionResult Putcomplexity(int id, complexity complexity)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            if (id != complexity.ID)
            {
                return(BadRequest());
            }

            db.Entry(complexity).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!complexityExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(StatusCode(HttpStatusCode.NoContent));
        }
        public IHttpActionResult Getcomplexity(int id)
        {
            complexity complexity = db.complexity.Find(id);

            if (complexity == null)
            {
                return(NotFound());
            }

            return(Ok(complexity));
        }
        public IHttpActionResult Postcomplexity(complexity complexity)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            db.complexity.Add(complexity);
            db.SaveChanges();

            return(CreatedAtRoute("DefaultApi", new { id = complexity.ID }, complexity));
        }
        public IHttpActionResult Deletecomplexity(int id)
        {
            complexity complexity = db.complexity.Find(id);

            if (complexity == null)
            {
                return(NotFound());
            }

            db.complexity.Remove(complexity);
            db.SaveChanges();

            return(Ok(complexity));
        }