primesieve  7.5
count_primes.c

C program that shows how to count primes.

#include <primesieve.h>
#include <inttypes.h>
#include <stdio.h>
int main()
{
uint64_t count = primesieve_count_primes(0, 1000);
printf("Primes below 1000 = %" PRIu64 "\n", count);
return 0;
}
primesieve.h
primesieve C API. primesieve is a library for fast prime number generation. In case an error occurs e...
primesieve_count_primes
uint64_t primesieve_count_primes(uint64_t start, uint64_t stop)
Count the primes within the interval [start, stop].