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primetest.c
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1993-10-14
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253 b
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19 lines
void ISPRIME(long number,short *isprime) {
long i;
if (number < 2) {
*isprime = 0;
return;
}
for (i=2;i*i<=number;i++)
{
if ((number % i) == 0) {
*isprime = 0;
return;
}
}
*isprime = -1;
return;
}