18.04 gcc一个简单的c程序

出现

functionTest01.c:1:19: fatal error: stdio.h: No such file or directory  #include <stdio.h>

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IMHO我认为这个问题更适合Ubuntu论坛：你已经在你的系统中添加了另一个源代码，它提供了更新的libc6包，而libc6开发人员要想工作，需要libc6的降级版本。修复您的源代码或手动降级libc6包。我在中国。因为防火墙，我只能使用我们的国家源代码。我准备了gcc和gdb的编译源代码包，但是有很多很有用的包，比如gmp和mpc等。

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 libc6-dev : Depends: libc6 (= 2.23-0ubuntu11) but 2.27-3ubuntu1 is to be installed
             Depends: libc-dev-bin (= 2.23-0ubuntu11)
E: Unable to correct problems, you have held broken packages.