29 lines
603 B
C++
29 lines
603 B
C++
#include <iostream>
|
|
#include <cmath>
|
|
#include "Function.hpp"
|
|
|
|
|
|
|
|
int main()
|
|
{
|
|
Function<double(double)> f;
|
|
|
|
if (!f)
|
|
std::cout << "Egyelőre nullptr" << std::endl;
|
|
|
|
f = sin;
|
|
std::cout << sin(2.3) << "==" << f(2.3) << std::endl;
|
|
|
|
f = [] (double x) { return x*x; };
|
|
std::cout << 2.3*2.3 << "==" << f(2.3) << std::endl;
|
|
|
|
f = std::bind(pow, std::placeholders::_1, 4);
|
|
std::cout << pow(2.3, 4) << "==" << f(2.3) << std::endl;
|
|
|
|
f = nullptr;
|
|
try {
|
|
f(2.3);
|
|
} catch (std::bad_function_call &e) {
|
|
std::cout << "Megint nullptr" << std::endl;
|
|
}
|
|
} |