不能使用 g++ 编译器

Question

我试图这样做：

$ g++
The program 'g++' is currently not installed. You can install it by typing:
sudo apt-get install g++
$ sudo apt-get install g++
[sudo] password for user: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
g++ is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.

Answer 1

这可能表明您已经安装g++，然后在某个时候手动删除了实际的 g++ 二进制文件或其符号链接。

您可以通过使用以下--reinstall选项运行 apt-get install 来强制重新安装（包括重新创建符号链接）：

sudo apt-get install --reinstall g++