private string MultiplyVectorAndMatrix(string vectorFile, string matrixFile)
{
WriteLog(LogStrings.TryingToMultiplyMatrixAndVector(matrixFile, vectorFile));
int[,] matrix = GetMatrixFromFile(matrixFile);
int[] vector = GetVectorFromFile(vectorFile);
if (matrix.GetLength(1) != vector.Length)
{
return(null);
}
string fileName = GetFileName(vectorFile, matrixFile);
StreamWriter writer = new StreamWriter(fileName);
int length = matrix.GetLength(0);
writer.WriteLine(length);
for (int i = 0; i < length; i++)
{
BigInteger number = 0;
for (int j = 0; j < vector.Length; j++)
{
number += matrix[i, j] * vector[j];
}
writer.Write(number);
if (i != length - 1)
{
writer.Write(' ');
}
}
WriteLog(LogStrings.MultiplicationWasSuccessful(matrixFile, vectorFile));
writer.Close();
return(fileName);
}