CS计算机代考程序代写 #include

#include
#include
#include “uthread.h”

struct sum_args {
int *a;
int s;
};

void* sum (void* args_v) {
struct sum_args *args = (struct sum_args*) args_v;
int i, sum = 0;
for (i=0; is; i++)
sum += args->a[i];
return (void*) (long int) sum;
}

int par_ave (int *a, int s) {
struct sum_args a1, a2;
long int r1, r2;
uthread_t *t1, *t2;

a1.a = a;
a1.s = s/2;
t1 = uthread_create (sum, (void *) &a1);
a2.a = a + a1.s;
a2.s = s-a1.s;
t2 = uthread_create (sum, (void *) &a2);
r1 = (long int) uthread_join (t1);
r2 = (long int) uthread_join (t2);
return (r1+r2)/s;
}

int array[] = { 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 };

int main (int argc, char** argv) {
uthread_init (2);
printf (“ave=%d\n”, par_ave (array, sizeof(array) / sizeof(array[0])));
}