Summary of Linux printf and fork () issues

Summarized as follows:

printf"father begin");      pid_t pid; PID=Fork (); if(PID >0)      {           while(1) {printf ("Father out"); Sleep (1); }      }      Else if(PID = =0)      {           while(1) {printf ("Child out \ n" ); Sleep (1); }     }     

It is important to note that printf is a C standard library function that runs in a user-owned buffer where a row buffer encounters \ n or a full or similar getchar scanf function will flush the buffer or the process will not automatically flush the buffer when it finishes running

A generic open file when fully buffered Linux endpoints are also row buffers

Fork () assigns all the data of the main process to include buffers so it happens that some of your unexpected results are different from what you think.

Summary of Linux printf and fork () issues