One of n lines in a file: Difference between revisions
Content added Content deleted
(→{{header|Perl 6}}: add) |
|||
Line 20:
Note: You may choose a smaller number of repetitions if necessary, but mention this up-front.
=={{header|C}}==
<lang c>#include <stdio.h>
#include <stdlib.h>
inline int irand(int n)
{
int r, randmax = RAND_MAX/n * n;
while ((r = rand()) >= randmax);
return r / (randmax / n);
}
inline int of_n(int n)
{
int i, r = 0;
for (i = 1; i < n; i++) if (!irand(i + 1)) r = i;
return r;
}
int main(void)
{
int i, r[10] = {0};
for (i = 0; i < 1000000; i++, r[of_n(10)]++);
for (i = 0; i < 10; i++)
printf("%d%c", r[i], i == 9 ? '\n':' ');
return 0;
}</lang>output<lang>100561 99814 99816 99721 99244 99772 100790 100072 99997 100213</lang>
=={{header|Perl 6}}==
{{trans|Python}}
Line 37 ⟶ 65:
Output:
<pre>100288 100047 99660 99773 100256 99633 100161 100483 99789 99910</pre>
=={{header|Python}}==
<lang python>from random import random as rnd
| |||