linux - How do I know if gcc g++ is installed in my centos?

Question

I want to know how to know whether gcc g is installed in my system

Answer 1

`
whereis gcc
whereis g++

`

Answer 2

Execute

yum install gcc

If you have installed it, he will tell you that you have installed it
If you have not installed it, he will ask you if you want to install it

Answer 3

rpm -qa|egrep 'gcc|g\+\+'

Answer 4

Press gcc and press Enter, or press which gcc and press Enter.

Answer 5

yum --disablerepo=* --enablerepo=c6-media install gcc gcc-c++

Answer 6

Enter gcc directly in the terminal to know whether gcc is installed