C++ Ubuntu Configuration

To install and use C++17 on Ubuntu, you generally need to install a version of GCC (GNU Compiler Collection) that supports C++17. Here's how you can do it:

Step 1: Update Your Package List

First, update your package list to ensure you have the latest information about available packages:

sudo apt update

Step 2: Install GCC

Install the latest version of GCC. GCC 7 and later versions support C++17.

sudo apt install g++

Step 3: Check the Installed Version of GCC

After installation, verify the version of GCC installed to ensure it supports C++17:

g++ --version

You should see a version number. If it's 7 or later, you're good to go.

Step 4: Compile C++ Code with C++17 Standard

When compiling your C++ code, use the -std=c++17 flag to enable C++17 features:

g++ -std=c++17 -o output_file your_source_file.cpp

Step 5: Run Your Compiled Program

Finally, run your compiled program:

./output_file

Optional: Install a Specific Version of GCC

If you need a specific version of GCC (e.g., GCC 9), you can install it explicitly:

sudo apt install g++-9

Then, you can use this specific version by calling it directly:

g++-9 -std=c++17 -o output_file your_source_file.cpp

By following these steps, you should be able to set up and use C++17 on your Ubuntu system.

C++11 and C++17 are not separate installations or packages that you can uninstall or install independently. Instead, they are different versions of the C++ standard that are supported by your compiler (GCC, in this case).

Key Points:

1. GCC Versions and Standards:

   • Your GCC compiler supports multiple C++ standards, including C++11, C++14, C++17, and later.

   • When you compile a program, you specify which standard to use (e.g., -std=c++11 for C++11, -std=c++17 for C++17).

2. Uninstalling C++11:

   • You cannot uninstall a specific C++ standard like C++11, because the GCC compiler supports all standards by default.

   • Instead, you choose which standard to use at compile time with the -std flag.

3. Using C++17:

   • If you want to use C++17, simply compile your code with the -std=c++17 flag, as shown earlier.

Example:

• To compile with C++11:

  g++ -std=c++11 -o output_file your_source_file.cpp

• To compile with C++17:

  g++ -std=c++17 -o output_file your_source_file.cpp

There is no need to uninstall anything; you just need to specify the desired C++ standard when compiling your programs.