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  1. #include <stdio.h>
  2. int main()
  3. {
  4. 	int a,i,count;
  5.     scanf("%d",&a);
  6.     count=0;
  7.  
  8. 	for( i=1 ; i<=a ; i++ ){
  9. 		if(a%i==0){
  10. 			count++;
  11. 		}
  12. 	}
  13. 	if(count==2)
  14. 		printf("%dは素数です。\n",a);
  15. 	else printf("%dは素数ではありません。\n",a);
  16.  
  17.  
  18.    return 0;
  19. }
Success #stdin #stdout 0s 5244KB
comments (?)
stdin
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3
stdout
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3は素数です。
https://ideone.com/lZGQvP
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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