Compiling using g++ and xCode

[wfe2015]

I am still trying to compile a C++ program properly using terminal and xcode. I found this link here on how to compile: http://www1.cmc.edu/pages/faculty/alee/g++/g++_mac.html

I already have xcode installed with the command line tools. However, when I enter the code

g++ -g hello.cpp -o hello -lm

in the terminal to make it compile, it says

xcrun: Error: failed to exec real xcrun. (No such file or directory).

May I know what is happening? The file is saved in desktop and I did cd ~ then cd desktop in the terminal, then typed the g++ -g hello.cpp -o hello -lm code, but there is still an error. Please see the dropbox image.

Also, do you happen to know why the file in the Xcode sidebar is called hello.cp when I first did it?

https://www.dropbox.com/sh/ghew8r5fbi7j23f/AADvmwp6akUY2ZKh_p6LjjM7a?dl=0

Thank you!

[LB]

What version of XCode did you install?

Normally you shouldn't try to directly invoke a compiler that is bundled with an IDE, you should just use the IDE and tell it to build and run your project. If you have issues, uninstall and reinstall.