C and C++ program to find the minimum of two numbers using function overloading

# include "iostream.h"
# include "conio.h"
int min(int a, int b)
{
 if (a< b )
  return(a);
 else
  return(b);
}
char min(char a, char b)
{
 if (a< b )
  return(a);
 else
  return(b);
}
double min(double a, double b)
{
 if (a< b )
  return(a);
 else
  return(b);
}
void main()
{
 int n, n1;
 char ch, ch1;
 double d, d1;
 clrscr();
 cout << "Enter two integers ";
 cin >> n >> n1;
 cout << "Enter two characters ";
 cin >> ch >> ch1;
 cout << "Enter two double precision quantity ";
 cin >> d >> d1;
 cout << "\nMinimum of two integer "<< min(n,n1);
 cout << "\nMinimum of two characters "<< min(ch,ch1);
 cout << "\nMinimum of two double precision quantity "<< min(d,d1);
}