Login | Register   
RSS Feed
Download our iPhone app
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.

Tip of the Day
Language: C++
Expertise: Intermediate
Jul 14, 2004



Building the Right Environment to Support AI, Machine Learning and Deep Learning

Create an Easy to Use Clamp Template for Constraining Values

Often, in code, you find yourself constraining values doing something like:

if(val < MIN)
  val = MIN;
else if(val > MAX)
  val = MAX;
This simple template function will do that for you. The template uses two types, so that the in value doesn't have to be the same type as the constraints. As long as a comparison operator is defined between them, it will still work.

template<class T, class U>
T clamp(T in, U low, U high)
    if(in <= low)
        return low;
    else if(in >= high)
        return high;
        return in;
If you are trying to restrain a value in just one direction, it is easiest to use std::min(a,b) and std::max(a,b).


double degrees;
cin >> degrees;
degrees = clamp(degrees,0,360);     
//restrain degrees to an appropriate value

val = std::max(val,0);     
//make sure value doesn't drop below 0

people_to_invite = std::min(people_not_invited,seats_left);  
//ensure value doesn't get above seats_left
James Turk
Comment and Contribute






(Maximum characters: 1200). You have 1200 characters left.



Thanks for your registration, follow us on our social networks to keep up-to-date