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Tip of the Day
Home » Tip Bank » C++
Language: C++
Expertise: Beginner
May 19, 2004

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Prefer Templates to Macros

Because macros do not behave as function calls but merely as text substitutions, they might exhibit strange behaviors during complex calls. For instance:
	
#define mul (t) t*t*t
mul(3+3) gives 24 though the expected result is 216.
Templates, on the other hand, follow the semantics of function definition and function call. They also enforce type checking unlike macros:

template <class type>
type mul_t (type t)
{
return t*t*t;
}
mul_t(3+3) gives expected result of 216.
Saurabh Ramya
 
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