在 C++ 中定义变量的最大值和最小值

Question

I'm working on a project, and was curious about if there's an easy way to define custom max and min values for a double variable. At the moment, there's a quite large if-else if block handling this, but my question is can I do something in the variable's declaration so that these checks are unneeded?

Answer 1

was curious about if there's an easy way to define custom max and min values for a double variable.

Since C++17, there is standard library function std::clamp that you can use to set out of-bound value to maximum / minimum depending on which boundary it exceeded.

If you need some other behaviour for out-of-bound values, or need to support older C++, the you can use if-else to check whether a new value is within the allowed bounds.

At the moment, there's a quite large if-else if block handling this,

Two conditionals should be sufficient. One for upper bound, another for lower.