plzz help me with this program

```
#include<iostream.h>
#include<conio.h>
int sum(int s);
int sum(int x);
int sum(int j,int k);
float sum(float p,int q);
float sum(float y,float z);
void main()
{
cout<<sum(0)<<"\n";
cout<<sum(3)<<"\n";
cout<<sum(6,7)<<"\n";
cout<<sum(5.5,8)<<"\n";
cout<<sum(4.9,3.5)<<"\n";
getch();
}
int sum(int s)
{
return s;
}
int sum(int x)
{
return x;
}
int sum(int j,int k)
{
return (j+k);
}
float sum(float p,int q)
{
return (p+q);
}
float sum(float y,float z)
{
return (y+z);
}
```