Ryzom

 1#include <stdio.h>
 2#include <stdint.h>
 3#include <algorithm>
 4
 5template<class T>    inline T maxof(const T& a,  const T& b,  const T& c)
 6    {return std::max(std::max(a,b),c);}
 7
 8uint8_t R = 127;
 9uint8_t G = 127;
10uint8_t B = 127;
11
12int main()
13{
14    float r = R / 255.f;
15    float g = G / 255.f;
16    float b = B / 255.f;
17
18    float maxV = maxof(r, g, b);
19
20    // Get hue
21    if (maxV == r)
22    {
23        printf("r = %f\n", r);
24    }
25    else if (maxV == g)
26    {
27        printf("g = %f\n", g);
28    }
29    else
30    {
31        printf("b = %f\n", b);
32    }
33
34    return 0;
35}
36

Will give :

b = 0.498039

When compiled with : g++ -O2 test.cpp -o test

and

r = 0.498039

When compiled with : g++ -O0 test.cpp -o test