C++ code not finding 10001th prime -


i wrote code project euler problem #7(find 10001st prime number) isn't working , throwing out sorts of wrong answers(such numbers)

#include <iostream> #include <math.h>   using namespace std;  int main() { long long numprime = 1; long long counter = 3; long long arrofprimes[10001]; for(int = 0; < 10001; i++) {     arrofprimes[i] = 2; } while(true) {     if(numprime == 10001)     {         break;     }     bool isprime = true;     for(int = 0; < numprime; i++)     {         if((counter % arrofprimes[i]) == 0)         {             isprime = false;             break;         }     }     if(isprime)     {         numprime++;         arrofprimes[numprime - 1] = counter;     }     counter++; } cout << counter << endl; }

you have incremented counter after finding 10001st prime, giving off-by-one error.


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