visual c++ - C++ what is wrong with my function call -

have following code in main method:

int main(int argc, char* argv[]) {      color c1(10,1,2);      hsl h=converttohsl(c1);     return 0; }

with following converttohsl method:

hsl converttohsl(color const& c) {     return hsl(0,0,0); }

and getting build errors in project. color class defined follows:

color::color(){} color::color(float r,float g,float b){     this->r=r;     this->g=g;     this->b=b; }  color::~color(void){}

hsl defined follows:

 hsl::hsl() {} hsl::hsl(float h,float s,float l) {     this->h=h;     this->s=s;     this->l=l; }  hsl::~hsl(void){}

with converttohsl method mentioned.

what possibly wrong?

c1 isn't declared. did mean

color c1(10,1,2);

Ben