c++ rgb to hsv conversion - c++

Question

i am trying to write a program that converts RGB color space to HSV space. it is based on the conversion algorithm described here . most of the places i searched for has a similar algorithm for conversion.
my input to the program: 67 42 96
output: 267.778 , 0.5625, 96
^^^^^ // it should be 38 as below
expected output: 268 56% 38%
^^^^^^
i can see for other inputs also H & S values are as they should be but the V value is different. what could be the reason fot that?
#include<iostream>
#include <algorithm> // std::max
using namespace std;
void rgb2hsv(float r, float g, float b) {
float h = 0.0;
float s = 0.0;
float v = 0.0;
float min = std::min( std::min(r, g), b );
float max = std::max( std::max(r, g), b );
v = max; // v
float delta = max - min;
if( max != 0.0 )
s = delta / max; // s
else {
// r = g = b = 0 // s = 0, v is undefined
s = 0.0;
h = -1.0;
cout<<h<<" , "<<s<<" , "<<v<<endl;
}
if( r == max )
h = ( g - b ) / delta; // between yellow & magenta
else if( g == max )
h = 2.0 + ( b - r ) / delta; // between cyan & yellow
else
h = 4.0 + ( r - g ) / delta; // between magenta & cyan
h = h * 60.0; // degrees
if( h < 0.0 )
h += 360.0;
cout<<h<<" , "<<s<<" , "<<v<<endl;
}
int main(){
while(1){
float r,g,b;
cin>>r>>g>>b;
rgb2hsv(r,g,b);
}
return 0;
}