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primes.c
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primes.c
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/*
Copyright (C) 2001-2003, Parrot Foundation.
=head1 NAME
examples/benchmarks/primes.c - Calculate prime numbers < 50000
=head1 SYNOPSIS
% make examples/benchmarks/primes
% time examples/benchmarks/primes
=head1 DESCRIPTION
Calculates all the prime numbers up to 50000 and prints out the number
of primes and the last one found.
=head2 Functions
=over 4
=cut
*/
#include <stdio.h>
/*
=item C<int main(int argc, char *argv[])>
Main function to run the example.
=cut
*/
int
main(int argc, char *argv[])
{
int I1 = 1;
int I2 = 50000;
int I3;
int I4;
int I5;
int I6 = 0;
int I7;
printf("N primes up to ");
printf("%d", I2);
printf(" is: ");
REDO:
I3 = 2;
I4 = I1 / 2;
LOOP:
I5 = I1 % I3;
if (I5) {goto OK;}
goto NEXT;
OK:
I3++;
if (I3 <= I4) {goto LOOP;}
I6++;
I7 = I1;
NEXT:
I1++;
if (I1 <= I2) {goto REDO;}
printf("%d\n", I6);
printf("last is: %d\n", I7);
return 0;
}
/*
=back
=head1 SEE ALSO
F<examples/benchmarks/primes.c>,
F<examples/benchmarks/primes.pasm>,
F<examples/benchmarks/primes.pl>,
F<examples/benchmarks/primes2_p.pasm>,
F<examples/benchmarks/primes2.c>,
F<examples/benchmarks/primes2.pir>,
F<examples/benchmarks/primes2.py>.
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4 cinoptions='\:2=2' :
*/