global function code example
Example: Implementing a global function
#include<iostream>
using namespace std;
class space
{
int x;
int y;
int z;
public:
void setdata (int a, int b, int c);
void display(void);
friend void operator- (space &s);
};
void space ::setdata (int a, int b, int c)
{
x=a; y=b; z=c;
}
void space::display(void)
{
cout<<x<<" "<<y<<" "<<z<<"\n";
}
void operator- (space &s)
{
s.x =- s.x;
s.y =- s.y;
s.z =- s.z;
}
int main ()
{
space s;
s. setdata (5,2,9);
cout<<"s:";
s. display ();
-s;
cout<<"-s:";
s. display ();
return 0;
}