Template Practice (Give absolute value)

#include<iostream.h>
#include<conio.h>
template<class T>
T abs(T a)
{
 cout<<"\nabs <"<<a<<">= ";
 return a>0?a:a*(-1);
}
void main()
{
 int a=0;
 float b=0;
 double c=0;

 cout<<"\n Enter integer number ";
 cin>>a;
 cout<<"\n Enter floating point number ";
 cin>>b;
 cout<<"\n Enter double number ";
 cin>>c;
 cout<<abs(a);
 cout<<abs(b);
 cout<<abs(c);
}