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  1. //Xinnuo Wang                   CS1A                   Chapter6 Page.375 #21
  2. /*******************************************************************************
  3.  * 
  4.  * Determine an interger is prime
  5.  * _____________________________________________________________________________
  6.  * The program accept an integer and determine it's prime or not.
  7.  * 
  8.  * _____________________________________________________________________________
  9.  * Input
  10.  *    num    : The accepted integer
  11.  * Output
  12.  *    t      : True, reperesent the interger is prime
  13.  *    f      : Fslse,reperesent the interger isn't prime
  14.  * ****************************************************************************/
  15. #include <iostream>
  16. using namespace std;
  17. bool isPrime(int num);
  18. int main() 
  19. {
  20. 	int num;
  21. 	cout << " Enter an integer" << endl;
  22. 	cin>> num;
  23. 	cout << isPrime(num);
  24. 	return 0;
  25. }
  26. bool isPrime(int num)
  27. {
  28. 	for (int i = 2; i< num; i++)
  29. 	{
  30. 		if (num % i == 0)
  31. 		return false;
  32. 	}
  33. 	return true;
  34.  
  35. }
Success #stdin #stdout 0.01s 5292KB
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https://ideone.com/GAldST
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
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