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  1. #include <ctime>
  2. #include <iostream>
  3. #include <stdlib.h>     /* srand, rand */
  4.  
  5. using namespace std;
  6.  
  7. class C{
  8.     public: int data=0;
  9. };
  10. class B{
  11.     public: C* c;	int accu=0;
  12.     public: B(){
  13.     	c=new C();
  14.     }
  15.     public: void doSomething(){
  16.     	accu+=c->data; //do something about c
  17.     }
  18. };
  19. int main() {
  20. 	using namespace std;
  21.  
  22. 	const int NUM=1000000;
  23. 	B* bs[NUM];
  24. 	for(int n=0;n<NUM;n++){
  25. 	    bs[n]=new B();
  26. 	}
  27. 	for(int loop=0;loop<20;loop++){
  28. 		double accumulator=0;
  29.  
  30. 		for(int n=0;n<NUM;n++){
  31. 			int iSecret = rand() % NUM;
  32. 			clock_t begin = clock();
  33. 		    bs[iSecret]->doSomething();
  34. 		    clock_t end = clock();
  35. 		    accumulator+=double(end - begin);
  36. 		}
  37.  
  38. 		double elapsed_secs = accumulator;
  39. 		std::cout<<elapsed_secs<<std::endl;
  40. 	}
  41. }
Time limit exceeded #stdin #stdout 5s 148672KB
comments (?)
stdin 
Standard input is empty
stdout 
299587
299366
299982
303101
301583
301165
297351
297098
299671
302878
298860
https://ideone.com/0knpaF
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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