[Dev-C++] I am having trouble with 5.0

[Jeremy P. <jpe...@ea...>]

I have 4.0 installed and I can compile and run the programs fine, but I
installed 5.0...yes, I un-installed 4.0...and then I went to try to
compile a hello world just to make sure it worked, and it could not find
iostream. What did I do wrong? Should I try installing mingw separately?