compiling issue

[zewangnew]

Thanks for sharing the code. I noticed the following error in gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0/ios:40.
and had to use fail() to make it work. In other words, "inputfile == NULL" needs to be replaced by "inputfile.fail()
../te-datainit.cpp:94:17: error: no match for ‘operator==’ (operand types are ‘std::ifstream’ {aka ‘std::basic_ifstream’} and ‘long int’)
94 | if (inputfile == NULL) {