c语言中如何返回一个数组函数

#include 

using namespace std;
int ac1(int a,int b){
    int maxx,minn;
    maxx=a>b?a:b;
    minn=a>a>>b;
    int *p;
    p=ac(a,b,s);
    cout<
using namespace std;
//定义指针函数
int *copy(int array[], int a[], int n);
int main(){
    int size = 4;
    int a2[4];
    int a1[4] = {3, 5, 7 ,8};
    int *p;
    p = copy(a1, a2, size);
    cout << p[0] << " " << p[1] << " "<