Im trying to use tgamma function in c++ 10.It's running on a 32-bit machine. I've included , but still getting the error "identifier tgamma is undefined ". what could be the reason?
The reason why you cannot use tgamma is because your compiler doesn't support the standard in which it was introduced. You'll need to use a compiler / standard library that does support c++11 or use another implementation of tgamma as advised in an answer to in a similar question What to do if tgamma() function is not defined? which Resource kindly linked for you.