Function init_array_A

code/Chapter9/9-8.c:5–9

#define N 2000
int A[N];
void init_array_A(int* a){
	#pragma omp parallel for
	for(int i=0;i<N;i++)
		a[i]=i;
}
int main()
{
double start_time,end_time,used_time;