primes.6

UNIX v6源代码 这几乎是最经典的unix版本 unix操作系统设计和莱昂氏unix源代码分析都是用的该版

.th PRIMES VI 4/10/75
.sh NAME
primes  \*-  print all primes larger than somewhat
.sh SYNOPSIS
.bd primes
.sh DESCRIPTION
When
.it primes
is invoked, it waits for a number to be typed in.
If you type in a positive
number less than 2\u\s756\s0\d (about
.if n 7.2e16)
.if t 7.2\(mu10\u\s716\s0\d\|)
it will print all primes greater than or
equal to this number.
.sh DIAGNOSTICS
`Ouch.' for input out of range or for garbage input.
.sh BUGS