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  1. #include <stdio.h>
  2. #include <stdbool.h>
  3.  
  4. bool prime(int n){
  5. 	for(int i=2; i*i<=n;i++){
  6. 		if(n%i==0)
  7. 			return false;
  8. 		else 
  9. 			continue;
  10. 	}
  11. 	return true;
  12. }
  13.  
  14. int main(void) {
  15. 	int l,r;
  16. 	scanf("%d%d",&l,&r);
  17. 	int count=0;
  18. 	bool isprime;
  19. 	for(int i=l;i<=r;i++){
  20. 		isprime=prime(i);
  21. 		if(isprime)
  22. 			count++;
  23. 	}
  24. 	printf("%d",count);
  25. 	return 0;
  26. }
  27.  
Success #stdin #stdout 0.01s 5264KB
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https://ideone.com/QRMb2r
language:
C (gcc 8.3)
created:
17 days ago
visibility:
public

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