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#include<.h> pipe_fd[ w_buffer[],r_buffer[ (pipe(pipe_fd)< - ((pid1=fork( ))==) ]); sprintf(w_buffer,=],w_buffer,); (pid1>) ); ((pid2=fork( ))==) ]); sprintf(w_buffer,=], (pid2>) ); close(pipe_fd[]); (read(pipe_fd[],r_buffer,)>(read(pipe_fd[],)>