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  1. #include <stdio.h>
  2. #include <omp.h>
  3.  
  4. #define N 1000000
  5.  
  6. int main() {
  7.     double sum = 0.0;
  8.     double a[N], b[N];
  9.  
  10.     // Initialize vectors a and b
  11.  
  12.     #pragma omp parallel for reduction(+:sum)
  13.     for (int i = 0; i < N; ++i) {
  14.         sum += a[i] * b[i];
  15.     }
  16.  
  17.     printf("Dot product: %f\n", sum);
  18.  
  19.     return 0;
  20. }
Success #stdin #stdout 0.01s 5304KB
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Standard input is empty
stdout
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Dot product: nan
https://ideone.com/B2ZSIU
language:
C (gcc 8.3)
created:
21 days ago
visibility:
public

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