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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	int x = 21;
  7. 	for (int y = 2; y < x; y++) {
  8. 		cout << y << endl;
  9. 		if (x % y == 0) {
  10. 			cout << "Not a prime." << endl;
  11. 			break;
  12. 		}
  13. 	}
  14.  
  15. 	return 0;
  16.  
  17. }
Success #stdin #stdout 0s 4544KB
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Standard input is empty
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Not a prime.
https://ideone.com/NIsUlQ
質數檢查之我暴力 (半成品)
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
secret

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