Using inline function in c ++

using namespace std;
#include<iostream>
#include<conio.h>
class number
{
private:
int x;
int y;
public:
void input()

{
cout<<"\n enter the value of x:";
cin>>x;
cout<<"\n enter the value of y:";
cin>>y;
}
inline int sum()
{
return(x+y);
}
inline int mult()
{

return(x*y);
    }};
    int main()
    {
    number n;
    n.input();
    int s;
    s=n.sum();
    int m;
    m=n.mult();
    cout<<"\n sum="<<s;
    cout<<"\n mult="<<m;
    return 0;
}