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task23.c
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task23.c
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#include <omp.h>
#include <stdio.h>
#include <stdlib.h>
#define N 50
int main (int argc, char *argv[]) {
int i, nthreads, tid;
float a[N], b[N], c[N], d[N];
/* Some initializations */
for (i=0; i<N; i++) {
a[i] = i * 1.5;
b[i] = i + 22.35;
c[i] = d[i] = 0.0;
}
#pragma omp parallel shared(a,b,c,d,nthreads) private(i,tid) {
tid = omp_get_thread_num();
if (tid == 0) {
nthreads = omp_get_num_threads();
printf("Number of threads = %d\n", nthreads);
}
printf("Thread %d starting...\n",tid);
#pragma omp sections nowait {
#pragma omp section {
printf("Thread %d doing section 1\n",tid);
for (i=0; i<N; i++) {
c[i] = a[i] + b[i];
printf("Thread %d: c[%d]= %f\n",tid,i,c[i]);
}
}
#pragma omp section {
printf("Thread %d doing section 2\n",tid);
for (i=0; i<N; i++) {
d[i] = a[i] * b[i];
printf("Thread %d: d[%d]= %f\n",tid,i,d[i]);
}
}
} /* end of sections */
printf("Thread %d done.\n",tid);
} /* end of parallel section */
}