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  1. #include <array>
  2. #include <iostream>
  3.  
  4. int main()
  5. {
  6. 	const static size_t size = 50000000;
  7. 	time_t begin, end;
  8.     time(&begin);
  9.     std::array<int, size> ar;
  10.     for (int i = 0; i < size; i++) {
  11.         ar[i] = i;
  12.     }
  13.     int start = 1;
  14.  
  15.     for (int i = 0; i < size; i++) {
  16.         start += (ar[i] * i);
  17.         ar[i] = start*ar[i];
  18.     }
  19.     for (int i = 0; i < size; i++) {
  20.     }
  21.     time(&end);
  22. 	int n = rand() % size;
  23.     std::cout << "std:array:" << end-begin << std::endl;
  24.     std::cout << "test" << ar[n];
  25.     std::cin >> start;
  26.     time(&begin);
  27.     int ar2[size];
  28.     for (int i = 0; i < size; i++) {
  29.         ar2[i] = i;
  30.     }
  31.     start = 1;
  32.  
  33.     for (int i = 0; i < size; i++) {
  34.         start += (ar2[i] * i);
  35.         ar2[i] = start * ar2[i];
  36.     }
  37.     std::cout << "\n";
  38.     time(&end);
  39.  
  40.     std::cout << "[]:" << end - begin << std::endl;
  41.     std::cout << "test" << ar2[n];
  42.  
  43. }
Success #stdin #stdout 0.33s 394160KB
comments (?)
stdin 
Standard input is empty
stdout 
std:array:0
test-1608114517
[]:0
test-1608114517
https://ideone.com/oP1ygb
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
secret

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