创建自定义运算符c ++ [英] Create custom operator c++

问题描述

我想问的是可能在C ++中定义自定义运算符ex。：

I'd like to ask is possible define custom operator in C++ ex.:

Func function;
double a[2] = {-3, 3};
function = function integrate a;

注意：integration是在<-3，3>之间进行数字积分的运算符。

Note: integrate is operator for numeric integration over interval <-3, 3>.

我真的很感兴趣，我只能创建自己的操作符。

I'm really interested only how I can create my own operator.

感谢您的回复和时间。
Mari

Thank you for yours responses and time. Mari

推荐答案

为什么你不是为你的集成方法写一个类（也许是一个完整的类hierachy）或者功能也是足够的。然后为其指定要作为参数进行集成的函数（使用 std :: function ）将允许这是一个函数指针，函子或lambda表达式）和集成的范围。这是我最近这样做的方式。例如在1D中：

Why don't you just write a class for your integration method (maybe a complete class hierachy) or a function is also sufficient. Then give it the function you want to integrate as a parameter (using std::function will allow this to be a function pointer, functor or lambda expression) and the range of your integration. This is the way I did this recently. For example in 1D:

#include <functional>
#include <iostream>

double integrate(std::function<double(double)> f, double a, double b)
{
    return (b-a)/2.0*(f(a)+f(b));
}

int main()
{
    std::cout << integrate([](double x){ return x*x;}, -3.0, 3.0) << std::endl;
    return 0;
}

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