Floating Point Exception

>implying /g/ knows how to code

I think sqrt () wants a double or float. Try making ul that instead and just drop the decimal in your print

Also if youre checking size in your for loops, dont do <= if you start with 0. Index range starts at 0, size count starts at 1. So just do < instead.

(A list with 3 uls has size 3 but indexes 0,1 and 2)

`n % i == 0` mods zero at first iteration, which is not allowed. Do you even use a debugger?

>>59751199
Yep this. Also it would work with 0 or lower, it just wouldn't do anything.

>>59750426
If you're debugging numerical errors, keep in mind 'floating point exceptions' are generally raised by divide-by-0 errors on integers (% operation is of course tied to the definition of division, or at the very least it also doesn't make sense to apply 0).

Floating point exceptions for floating point types don't generally get raised unless they're enabled or manually specified with <cfenv>.

>Do you even use a debugger?
Would have been the easiest and most appropriate thing here, >>59750426
get used to a debugging environment.

OP here

>Do you even use a debugger?
I do, and i caught the division-by-zero in testing. Just forgot the definition of mod, kinda tired

>Also if youre checking size in your for loops, dont do <= if you start with 0. Index range starts at 0, size count starts at 1. So just do < instead.
Good point, i'll redo that when im abit more awake.

This is how its looking right now, but it still wont print anything... so im just confused desu

#include <math.h>
#include <vector>
#include <stdio.h>

typedef unsigned long ul;

const ul PRIMES = 6000000;

bool isPrime(int n)
{
    if (n <= 1) return false;
    int sqN = sqrt(n);
    for (int i = 3; i <= sqN; i++) {
        if (n % i == 0) return false;
    } return true;
}

int main()
{
    std::vector<ul> primes, fizz, buzz, fizzbuzz;
    ul sumPrimes = 0, sumFizz = 0, sumBuzz = 0, sumFizzBuzz = 0;
    ul numPrimes = 0, numFizz = 0, numBuzz = 0, numFizzBuzz = 0;

    for (ul p = 0; p <= PRIMES; p++)         if (isPrime(p))                     primes.push_back(p);
    numPrimes = primes.size();
    for (ul f = 0; f <= numPrimes; f++)     if (primes[f] % 3 == 0)             fizz.push_back(f);
    numFizz = fizz.size();
    for (ul b = 0; b <= numPrimes; b++)          if (primes[b] % 5 == 0)             buzz.push_back(b);
    numBuzz = buzz.size();
    for (ul fb = 0; fb <= numPrimes; fb++)     if (primes[fb] % 15 == 0)             fizzbuzz.push_back(fb);
    numFizzBuzz = fizzbuzz.size();

    for (ul sp : primes)          sumPrimes += primes[sp];
    for (ul sf : fizz)                  sumFizz += fizz[sf];
    for (ul sb : buzz)                     sumBuzz += buzz[sb];
    for (ul sfb : fizzbuzz)    sumFizzBuzz += fizzbuzz[sfb];

    printf("\t\tPrimes upto <%lu>", PRIMES);
    printf("Primes: %lu\nFizz: %lu\nBuzz: %lu\nFizzBuzz: %lu\n", numPrimes, numFizz, numBuzz, numFizzBuzz);
    printf("Sum Primes: %lu\nSum Fizz: %lu\nSum Buzz: %lu\nSum FizzBuzz: %lu\n", sumPrimes, sumFizz, sumBuzz, sumFizzBuzz);
    return 0;
}

Didn't really expect responses, so thanks!