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  1. #include <iostream>
  2. #include <vector>
  3. #include <omp.h>
  4.  
  5. #define VECTOR_SIZE 1000000
  6.  
  7. int main() {
  8.     // Initialize vectors
  9.     std::vector<int> A(VECTOR_SIZE);
  10.     std::vector<int> B(VECTOR_SIZE);
  11.  
  12.     // Initialize vectors with random values
  13.     for (int i = 0; i < VECTOR_SIZE; ++i) {
  14.         A[i] = i;
  15.         B[i] = VECTOR_SIZE - i;
  16.     }
  17.  
  18.     int dot_product = 0;
  19.  
  20.     // Perform dot product in parallel
  21.     #pragma omp parallel for reduction(+:dot_product)
  22.     for (int i = 0; i < VECTOR_SIZE; ++i) {
  23.         dot_product += A[i] * B[i];
  24.     }
  25.  
  26.     // Output the result
  27.     std::cout << "Dot product result: " << dot_product << std::endl;
  28.  
  29.     return 0;
  30. }
  31.  
Success #stdin #stdout 0.01s 10864KB
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Standard input is empty
stdout
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Dot product result: 1183719328
https://ideone.com/d3Nc1B
language:
C++ (gcc 8.3)
created:
24 days ago
visibility:
public

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