Function init_array_B

code/Chapter9/9-9.c:5–9

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