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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int a,b,s=0;
  5. 	scanf("%d",&a);
  6. 	for(int i=2;i<a/2;i++){
  7. 		b=a%i;
  8. 		if(b==0){
  9. 			s=1;
  10. 			break;
  11. 		}
  12. 	}
  13. 	if(s==0 && a!=1)printf("%dは素数です",a);
  14. 	else printf("%dは素数ではないです",a);
  15. 	return 0;
  16. }
  17.  
Success #stdin #stdout 0s 4584KB
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1
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1は素数ではないです
https://ideone.com/RVQm9x
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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