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+/******************************************************************************
+* FILE: omp_reduction.c
+* DESCRIPTION:
+* OpenMP Example - Combined Parallel Loop Reduction - C/C++ Version
+* This example demonstrates a sum reduction within a combined parallel loop
+* construct. Notice that default data element scoping is assumed - there
+* are no clauses specifying shared or private variables. OpenMP will
+* automatically make loop index variables private within team threads, and
+* global variables shared.
+* AUTHOR: Blaise Barney 5/99
+* LAST REVISED: 04/06/05
+******************************************************************************/
+#include <omp.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main (int argc, char *argv[]) {
+
+int i, n;
+float a[100], b[100], sum;
+
+/* Some initializations */
+n = 100;
+for (i=0; i < n; i++)
+ a[i] = b[i] = i * 1.0;
+sum = 0.0;
+
+#pragma omp parallel for reduction(+:sum)
+ for (i=0; i < n; i++)
+ sum = sum + (a[i] * b[i]);
+
+printf(" Sum = %f\n",sum);
+
+ return 0;
+}