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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. int a,i;
  5. int flag=1;
  6. scanf("%d",&a);
  7. if(a==1){
  8. 	flag=0;
  9. }
  10. else{
  11. 	for(i=2;i<=a;i++){
  12. 	if(a%2==0){
  13. 		flag=0;
  14. 		break;
  15. 	}
  16. 	}
  17. }
  18. if(flag==1){
  19. 	printf("素数です\n");
  20. }
  21. else{
  22. 	printf("素数ではありません\n");
  23. }
  24. 	return 0;
  25. }
  26.  
Success #stdin #stdout 0s 5320KB
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素数です
https://ideone.com/GrqaFk
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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