Mega Code Archive
Template function to get maximum of two pointers
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/* The following code example is taken from the book
* "C++ Templates - The Complete Guide"
* by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002
*
* (C) Copyright David Vandevoorde and Nicolai M. Josuttis 2002.
* Permission to copy, use, modify, sell and distribute this software
* is granted provided this copyright notice appears in all copies.
* This software is provided "as is" without express or implied
* warranty, and with no claim as to its suitability for any purpose.
*/
#include <iostream>
#include <cstring>
#include <string>
// maximum of two values of any type
template <typename T>
inline T const& max (T const& a, T const& b)
{
return a < b ? b : a;
}
// maximum of two pointers
template <typename T>
inline T* const& max (T* const& a, T* const& b)
{
return *a < *b ? b : a;
}
// maximum of two C-strings
inline char const* const& max (char const* const& a,
char const* const& b)
{
return std::strcmp(a,b) < 0 ? b : a;
}
int main ()
{
int a=7;
int b=42;
std::cout<<"\n\n" << ::max(a,b); // max() for two values of type int
std::string s="hey";
std::string t="you";
std::cout<<"\n\n" << ::max(s,t); // max() for two values of type std::string
int* p1 = &b;
int* p2 = &a;
std::cout<<"\n\n" << ::max(p1,p2); // max() for two pointers
char const* s1 = "David";
char const* s2 = "Nico";
std::cout<<"\n\n" << ::max(s1,s2); // max() for two C-strings
}
42
you
0x22ff58
Nico"
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