gcc 8 install ubuntu code example
Example 1: gcc 7 install ubuntu
sudo update-alternatives --config gccExample 2: gcc 7 install ubuntu
sudo apt install gcc-7 g++-7 gcc-8 g++-8 gcc-9 g++-9sudo update-alternatives --config gccsudo apt install gcc-7 g++-7 gcc-8 g++-8 gcc-9 g++-9