understanding C code

>>59977678
pls use

 tags friend

>>59977678
Nope. That's a seive of eratothenes. Primevec is an array initially all set to nonzero. The first loop tests if the value is nonzero. If it is the inner loop sets all the multiples of I to 0.

After that completes only the primes are left with nonzero values.

>>59977678
prime vector notation, every positive whole number can be represented as a product of two primes.

first code finds prime vector tuples within a certain LIMIT incremented by 2 then calculates zero displacement.

second code prints out how many prime vectors and what each of those prime vectors are, respectively, given a LIMIT.

>>59977694
how do i use tags?

>>59977794
this was his code for question 1
I think i got that one
its I starts at 2 if I <LIMIT then I++

and then just inserts 1 into each element of that array right?
for (i = 2; i < LIMIT; i++) {
primeVec[i] = 1;
}

>>59977990
[ code ] and [ /code ] without spaces.

>>59977678

for (i = 2; i < LIMIT; i++) {
    if (primeVec[i]) {
        for (j = i; (i * j) < LIMIT; j++)
        {
            primeVec[i * j] = 0;
        }
    }
}

and

for (i = 2; i < LIMIT; i++) {
    if (primeVec[i]) {
        printf("[#%d, %3d] ", primeCount++, i);
    }
}

>>59978139
thank you!