public static AcosResult Acos(int startIdx, int endIdx, double[] real) { int outBegIdx = 0; int outNBElement = 0; double[] outReal = new double[endIdx - startIdx + 1]; RetCode retCode = TACore.Acos(startIdx, endIdx, real, ref outBegIdx, ref outNBElement, ref outReal); return(new(retCode, outBegIdx, outNBElement, outReal)); }