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  1. #include <iostream>
  2. #include <ctime>
  3. #include <omp.h>
  4.  
  5. const int N = 100000000; // Size of arrays
  6.  
  7. void sequentialAdd(const int* a, const int* b, int* result, int size) {
  8.     for (int i = 0; i < size; i++) {
  9.         result[i] = a[i] + b[i];
  10.     }
  11. }
  12.  
  13. void parallelAdd(const int* a, const int* b, int* result, int size) {
  14.     #pragma omp parallel for
  15.     for (int i = 0; i < size; i++) {
  16.         result[i] = a[i] + b[i];
  17.     }
  18. }
  19.  
  20. int main() {
  21.     // Allocate dynamic arrays
  22.     int* a = new int[N];
  23.     int* b = new int[N];
  24.     int* result = new int[N];
  25.  
  26.     // Initialize arrays with values
  27.     for (int i = 0; i < N; ++i) {
  28.         a[i] = 1;
  29.         b[i] = 2;
  30.     }
  31.  
  32.     // Sequential addition and timing
  33.     clock_t startSeq = clock();
  34.     sequentialAdd(a, b, result, N);
  35.     clock_t endSeq = clock();
  36.     double timeSeq = double(endSeq - startSeq) / CLOCKS_PER_SEC;
  37.     std::cout << "Sequential addition time: " << timeSeq << " seconds\n";
  38.  
  39.     // Parallel addition and timing
  40.     clock_t startPar = clock();
  41.     parallelAdd(a, b, result, N);
  42.     clock_t endPar = clock();
  43.     double timePar = double(endPar - startPar) / CLOCKS_PER_SEC;
  44.     std::cout << "Parallel addition time: " << timePar << " seconds\n";
  45.  
  46.     // Clean up dynamic arrays
  47.     delete[] a;
  48.     delete[] b;
  49.     delete[] result;
  50.  
  51.     return 0;
  52. }
Success #stdin #stdout 0s 5296KB
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stdin
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Standard input is empty
stdout
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Sequential addition time: 0 seconds
Parallel addition time: 0 seconds
https://ideone.com/Ctf5Cx
language:
C++14 (clang 8.0)
created:
3 days ago
visibility:
public

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