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  1. #include <stdio.h>
  2. #include <time.h>
  3.  
  4. int main(void) {
  5.     int count;
  6. 	int i;
  7. 	int j;
  8. 	int k;
  9. 	int c;
  10. 	int prime;
  11. 	clock_t start;
  12. 	clock_t end;
  13. 	double elapsed;
  14.  
  15. 	/* input */
  16. 	scanf("%d", &count);
  17.  
  18. 	/* measure time */
  19. 	start = clock();
  20. 	printf("2\n");
  21. 	c = 1;
  22. 	i = 3;
  23. 	while (c < count) {
  24. 		/* isPrime */
  25. 		j = i;
  26. 		k = 3;
  27. 		prime = 1;
  28. 		while (k < j) {
  29. 			if (i % k == 0) {
  30. 				prime = 0;
  31. 				break;
  32. 			}
  33. 			k = k + 2;
  34. 		}
  35.  
  36. 		/* output */
  37. 		if (prime) {
  38. 			c = c + 1;
  39. 			printf("%d\n", i);
  40. 		}
  41.  
  42. 		i = i + 2;
  43. 	}
  44. 	end = clock();
  45.  
  46. 	elapsed = end - start;
  47. 	printf("elapsed time:%f\n", elapsed); 
  48.  
  49. 	return 0;
  50. }
Success #stdin #stdout 0.01s 1680KB
comments (?)
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elapsed time:0.000000
https://ideone.com/svVrJv
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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