The following code example is taken from the book
C++ Templates - The Complete Guide
by David Vandevoorde and Nicolai M. Josuttis, Addison-Wesley, 2002
© Copyright David Vandevoorde and Nicolai M. Josuttis 2002
#include <iostream>
#include "math1.hpp"
#include "compose1.hpp"
#include "composeconv.hpp"
template<typename FO>
void print_values (FO fo)
{
for (int i=-2; i<3; ++i) {
std::cout << "f(" << i*0.1
<< ") = " << fo(i*0.1)
<< "\n";
}
}
int main()
{
// print sin(abs(-0.5))
std::cout << compose(Abs(),Sine())(0.5) << "\n\n";
// print abs() of some values
print_values(Abs());
std::cout << '\n';
// print sin() of some values
print_values(Sine());
std::cout << '\n';
// print sin(abs()) of some values
print_values(compose(Abs(),Sine()));
std::cout << '\n';
// print abs(sin()) of some values
print_values(compose(Sine(),Abs()));
}