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  1. #include <iostream>
  2. using namespace std;
  3. bool primeNumber(int);
  4. int sumPrimes(int);
  5. int main()
  6. {
  7.     cout << sumPrimes(1000) << '\n';
  8. }
  9. int sumPrimes(int n)
  10. {
  11.     int sum = 0;
  12.     for (int i = 2; i < n; i++)
  13.     {
  14.         if (primeNumber(i) == true)
  15.             sum += i;
  16.     }
  17.     return sum;
  18. }
  19. bool primeNumber(int i)
  20. {
  21.     if (i == 2 || i == 3 || i == 5 || i == 7)
  22.         return true;
  23.     if (i % 2 != 0 && i % 3 != 0 && i % 5 != 0 && i % 7 != 0)
  24.         return true;
  25.     return false;
  26. }
Success #stdin #stdout 0s 3456KB
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https://ideone.com/ZVQdAN
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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