memcpy()解法
#include<iostream>
#include <cstring>
using namespace std;
const int N = 110;
void copy(int a[],int b[],int size)
{
memcpy(b,a,size*4);
}
int main()
{
int a[N],b[N];
int n,m,size;
cin>>n>>m>>size;
for (int i = 0; i < n; i ++ )cin>>a[i];
for (int i = 0; i <m; i ++ )cin>>b[i];
copy(a,b,size);
for(int i=0;i<m;i++)cout<<b[i]<<" ";
cout << endl;
return 0;
}