Revise the following short program so that it uses a lambda expression instead of f1(). Don’t change show2().
#include
template
void show2(double x, T& fp) {std::cout << x << " -> " << fp(x) << '\n';}
double f1(double x) { return 1.8*x + 32;}
int main()
{
show2(18.0, f1);
return 0;
}