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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h> // clock(), clock_t 변수형
  4.  
  5. int samples[100];
  6. int graph[10];
  7.  
  8. int main()
  9. {
  10. 	int i;
  11.  
  12. 	for(i=0; i<10; i++)
  13. 	{
  14. 	    graph[i] = 0;
  15. 	}
  16.  
  17. 	for(i=0; i<100; i++)
  18. 	{
  19. 	    samples[i] = (int) rand()%100;
  20. 	}
  21.  
  22. 	float elapsedTime;
  23. 	clock_t startTime = 0, endTime = 0;
  24. 	startTime = clock(); // 시작 시간
  25.  
  26. 	for(i=0; i<100; i++)
  27. 	{
  28. 	    if( samples[i] >= 0 && samples[i] < 10) graph[0]++;
  29. 	    else if( samples[i] >= 10 && samples[i] < 20) graph[1]++;
  30. 	    else if( samples[i] >= 20 && samples[i] < 30) graph[2]++;
  31. 	    else if( samples[i] >= 30 && samples[i] < 40) graph[3]++; 
  32. 	    else if( samples[i] >= 40 && samples[i] < 50) graph[4]++; 
  33. 	    else if( samples[i] >= 50 && samples[i] < 60) graph[5]++;
  34. 	    else if( samples[i] >= 60 && samples[i] < 70) graph[6]++;
  35. 	    else if( samples[i] >= 70 && samples[i] < 80) graph[7]++;
  36. 	    else if( samples[i] >= 80 && samples[i] < 90) graph[8]++; 
  37. 	    else if( samples[i] >= 90 && samples[i] < 100) graph[9]++; 
  38. 	}
  39.  
  40. 	endTime = clock(); // 종료 시간
  41. 	elapsedTime = (float)(endTime - startTime) / (CLOCKS_PER_SEC);
  42. 	printf("elapsed time is : %f seconds.\n", elapsedTime);	
  43.  
  44. 	for(i=0; i<10; i++)
  45. 	{
  46. 		printf("%d ", graph[i] );
  47. 	}
  48.  
  49. 	return 0;
  50. }
  51.  
Success #stdin #stdout 0.01s 5408KB
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Standard input is empty
stdout
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elapsed time is : 0.000003 seconds.
5 9 17 10 6 8 13 9 13 10
https://ideone.com/z9amh5
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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