fork download
copy 
  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5. bool primeNumber(int num) {
  6.     float root = sqrt(num);
  7.     if (num <= 1) {
  8.         return false;
  9.     }
  10.     else if (num == 2 || num == 3) {
  11.         return true;
  12.     }
  13.     else {
  14.         for (int i = 2; i <= root; i++) {
  15.             if (num % i == 0) {
  16.                 return false;
  17.             }
  18.             else
  19.                 return true;
  20.         }
  21.     }
  22.  
  23. }
  24.  
  25.  
  26. int main() {
  27.  
  28.     int num, inputNum, count = 0;
  29.     cin >> num;
  30.  
  31.     for (int i = 0; i < num; i++) {
  32.         cin >> inputNum;
  33.         if (primeNumber(inputNum)) {
  34.             count++;
  35.         }
  36.     }
  37.     cout << count;
  38. }
Success #stdin #stdout 0.01s 5476KB
comments (?)
stdin
copy 
1
9
stdout
copy 
1
https://ideone.com/3KGVCB
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!