linux c 定時器

struct itimerval t; fflush(stdout); setvbuf(stdout,NULL,_IONBF,0); t.it_interval.tv_usec =20000; t.it_interval.tv_sec = 0; t.it_value.tv_usec =20000; t.it_value.tv_sec = 0; if( setitimer( ITIMER_REAL,

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