Eratosthenes.mj.out 1.65 KB
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class
identifier Eratosthenes
{
public
int
[
]
identifier primes
(
int
identifier max
)
{
boolean
[
]
identifier sieve
=
new
boolean
[
identifier max
]
;
int
identifier count
=
integer literal 0
;
{
identifier sieve
[
integer literal 0
]
=
false
;
identifier sieve
[
integer literal 1
]
=
false
;
int
identifier i
=
integer literal 2
;
while
(
identifier i
<
identifier max
)
{
identifier sieve
[
identifier i
]
=
true
;
identifier i
=
identifier i
+
integer literal 1
;
}
}
{
int
identifier prime
=
integer literal 2
;
while
(
identifier prime
<
identifier max
)
{
if
(
identifier sieve
[
identifier prime
]
)
{
identifier count
=
identifier count
+
integer literal 1
;
int
identifier mult
=
identifier prime
;
while
(
identifier prime
*
identifier mult
<
identifier max
)
{
identifier sieve
[
identifier prime
*
identifier mult
]
=
false
;
identifier mult
=
identifier mult
+
integer literal 1
;
}
}
identifier prime
=
identifier prime
+
integer literal 1
;
}
}
int
[
]
identifier result
=
new
int
[
identifier count
]
;
{
int
identifier i
=
integer literal 0
;
int
identifier j
=
integer literal 0
;
while
(
identifier i
<
identifier max
)
{
if
(
identifier sieve
[
identifier i
]
)
{
identifier result
[
identifier j
]
=
identifier sieve
[
identifier i
]
;
identifier j
=
identifier j
+
integer literal 1
;
}
identifier i
=
identifier i
+
integer literal 1
;
}
}
return
identifier result
;
}
public
static
void
identifier main
(
identifier String
[
]
identifier args
)
{
identifier Eratosthenes
identifier e
=
new
identifier Eratosthenes
(
)
;
int
identifier num
=
identifier System
.
identifier in
.
identifier read
(
)
;
identifier e
.
identifier sieve
(
identifier num
)
;
}
}
EOF