Versione int* concatena();

#include <iostream>
using namespace std;

int* concatena (int v1[],int v2[],int n1,int n2){
    int *v3=new int [n1+n2];
    for (int i=0;i<n1;i++){
        v3[i]=v1[i];
    }
    for (int i=0;i<n1;i++){
        v3[n1+i]=v2[i];
    }
    return v3;
}
int main(){
    int n1,n2;
    cout<<"n1: ";
    cin>>n1;
    cout<<"n2: ";
    cin>>n2;

    int vett1[n1];
    for (int i=0;i<n1;i++)
        cin>>vett1[i];

    int vett2[n2];
    for (int i=0;i<n2;i++)
        cin>>vett2[i];

    int *vett3 = concatena(vett1,vett2,n1,n2);
    for(int i =0;i<n1+n2;i++)
        cout<<vett3[i];
    delete [] vett3;
    return 0;
}