#include <itpp/itcomm.h>using namespace itpp;int main(){  // Declare the it_file class  it_file ff;  // Open the file "it_file_test.it" for reading  ff.open("it_file_test.it");  // Read the variable a from the file. Put result in vector a.  vec a;	  ff >> Name("a") >> a;  // Print the result  std::cout << "a = " << a << std::endl;  // Exit the program  return 0;}