Can't reinstall developer tools

Background:
I was using Xcode on my mac book pro, version 10.7.3 to work on an app I am making, and I ran to into an error with memory, I couldn't fix it by rolling back to a different version of the app (using tower), for I still got the same error.

I then uninstalled xcode, and reinstalled it and launched my project, and the error was fixed.

Later, I wanted to experiment with opengl, and I found that I couldn't for the development tools hadn't reinstalled when I reinstalled xcode with the app store. Also I tried to implement the thing that caused the error in my xcode project agian in a different way and I got the same error.
Line I used to uninstall xcode in terminal:
sudo /Developer/Library/uninstall-devtools --mode=all
My question: how do I get the developer tools back on my computer?

You can not reinstall it from the app store ?
That is strange .
Did it says that xcode is still installed .
Did you're system come with Lion preinstalled ?
Did you have the Snow Leopard install DVD ?
It is there under optional install .
If you you dohave the dvd install itb from there and than update it

dobby said:

You can not reinstall it from the app store ?
That is strange .
Did it says that xcode is still installed .
Did you're system come with Lion preinstalled ?
Did you have the Snow Leopard install DVD ?
It is there under optional install .
If you you dohave the dvd install itb from there and than update it

Click to expand...

I reinstalled xcode, and it says xcode is still installed
also the developer tools come with xcode, and for some reason it didn't install those.
the command to remove Xcode completely removes the developer folder, I am not sure how to get it back

Can't reinstall developer tools?!

Background:
I was using Xcode on my mac book pro, version 10.7.3 to work on an app I am making, and I ran to into an error with memory, I couldn't fix it by rolling back to a different version of the app (using tower), for I still got the same error.

I then uninstalled xcode, and reinstalled it and launched my project, and the error was fixed.

Later, I wanted to experiment with opengl, and I found that I couldn't for the development tools hadn't reinstalled when I reinstalled xcode with the app store. Also I tried to implement the thing that caused the error in my xcode project agian in a different way and I got the same error.
Line I used to uninstall xcode in terminal:
sudo /Developer/Library/uninstall-devtools --mode=all
My question: how do I get the developer tools back on my computer?

Merged threads - please don't crosspost.

doublet said:

I reinstalled xcode, and it says xcode is still installed
also the developer tools come with xcode, and for some reason it didn't install those.
the command to remove Xcode completely removes the developer folder, I am not sure how to get it back

Click to expand...

Is xcode still in the Application folder ?
IF so start xcode from there and begin a new project

dobby said:

Is xcode still in the Application folder ?
IF so start xcode from there and begin a new project

Click to expand...

Xcode is the only thing that reinstalled, I can begin a new project, but I can run it on the iphone simulator (there is no iphone simulator), or use opengl and write c++ programs because gcc is uninstalled and the developer part of opengl is uninstalled.

doublet said:

Xcode is the only thing that reinstalled, I can begin a new project, but I can run it on the iphone simulator (there is no iphone simulator), or use opengl and write c++ programs because gcc is uninstalled and the developer part of opengl is uninstalled.

Click to expand...

A few weeks `ago I deleted the xcode by accident .
Reinstall it from App store including iphone simulator .
And that is it .

I did reinstall it, it didn't install gcc or the other things. I was able to download the xcode 5.1 simulator using xcode, but it didn't automaticly install like it should

doublet said:

I did reinstall it, it didn't install gcc or the other things. I was able to download the xcode 5.1 simulator using xcode, but it didn't automaticly install like it should

Click to expand...

Are you registered as a developer ?
If so here is you're solution
http://www.tech-recipes.com/rx/726/mac-os-x-install-gcc-compiler/

open Xcode, go Xcode>Prefrences>>Downloads and then install cmd line tools and whatever other tools/documentation you would like from there.