A.7 Using the reduction Clause

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The following example demonstrates the reduction clause (Section 2.7.2.6 on page 28):

#pragma omp parallel for private(i) shared(x, y, n) \  
                         reduction(+: a, b)  
    for (i=0; i<n; i++) {  
        a = a + x[i];  
        b = b + y[i];  
    }