compare cmath::rint and std::ceil

rint-ceil.cpp

#include <cmath>
#include <iostream>

/*
clang++ -o rint-ceil rint-ceil.cpp;./rint-ceil
rint(1.11111): 1
ceil(1.11111): 2
rint(1.44444): 1
ceil(1.44444): 2
rint(1.5): 2
ceil(1.5): 2


*/

void print_result(float val) {
    std::clog << "rint(" << val << "): " << rint(val) << "\n";
    std::clog << "ceil(" << val << "): " << std::ceil(val) << "\n";
}

int main() {
    print_result(1.111111111);
    print_result(1.444444444445);
    print_result(1.5000000000000000000);
    return 0;
}