c 2b 2b std 3a 3afmin

1#include <iostream>
2#include <cmath>
3 
4int main()
5{
6    std::cout << "fmin(2,1)    = " << std::fmin(2,1) << '\n'
7              << "fmin(-Inf,0) = " << std::fmin(-INFINITY,0) << '\n'
8              << "fmin(NaN,-1) = " << std::fmin(NAN,-1) << '\n';
9}