I can't compile a C++ program with the g++ command

If I try compiling my C++ source file by the following command:

g++ a.cpp

it outputs:

The program 'g++' can be found in the following packages: * g++ * pentium builder
try:
sudo apt-get intsall <<a>selected package>

However, if I run the suggested command (sudo apt-get install g++), it shows that everything is already installed.

So, basically, how do I compile a simple C++ program in Ubuntu 12.04?

1 Answer

Try this

sudo apt-get update

sudo apt-get install build-essential