Referenser#include <iostream>using namespace std;

void get1(int c){ c=5;}

void get2(int* c){ if(c!=NULL) *c=5;}

void get3(int& c){ c=7;}

void main (void){

int tal=0;int *tal2=NULL;tal2=&tal;cout<<"change a copy"<<endl;get1(tal);cout<<tal<<" "<<*tal2<<endl;cout<<"change a pointer"<<endl;get2(&tal); //eller get2(tal2);cout<<tal<<" "<<*tal2<<endl;

int *tal3=NULL;get2(tal3);

cout<<"Reset"<<endl;tal=0;cout<<tal<<" "<<*tal2<<endl;get3(tal);cout<<tal<<" "<<*tal2<<endl;

}

change a copy

0 0

change a pointer

5 5

Reset

0 0

7 7