//example call code
MultiMerge<int, less<int>, UnSortedFile<int, less<int> > > test(file_name, 6, less<int>(), 100, -100, "/n", build_name[2]);test.Merge();
//example call code
MultiMerge<int, less<int>, UnSortedFile<int, less<int> > > test(file_name, 6, less<int>(), 100, -100, "/n", build_name[2]);test.Merge();