C + + gethostname ()

Use "gethostname ();" Get the computer name, first look at the source:

In Code::Blocks 16.01, set up project build Options...,debug > Linker settings > Link libraries: > Add, Add libwsock32.a, which is located in the installation directory codeblocks\mingw\lib\.

Running results in Code::Blocks 16.01:

The reason why the parameter localhostname should be set to 256 bytes is based on the reference given by Microsoft to the function GetHostName:

C + + gethostname ()