Install and change the gcc or g ++ version in Linux

Take gcc-4.3 and g ++-4.3 as an example: after sudoapt-getinstallgcc-4.3g ++-4.3 enters/usr/bin: cd/usr/bin first delete gcc associated with gcc4.4: sudormgccsudormg ++ re-build a soft-connection sudoln-sgcc-4.3gccsudoln-sg +...

Take gcc-4.3 and g ++-4.3 as an example:
Sudo apt-get install gcc-4.3 g ++-4.3

Then enter/usr/bin:
Cd/usr/bin

Delete the gcc associated with gcc4.4 first:
Sudo rm gcc
Sudo rm g ++

Create another soft connection
Sudo ln-s gcc-4.3 gcc
Sudo ln-s g ++-4.3g ++

Then, you can run the following command to check whether 4.3 is associated:
Ln gcc *
If the association is gcc4.3, you can make it with confidence.

Author hpwzd