...
double vet[] = { _a, _b, _c, _d, _e, _f };
double 	r = min(_a, _b);
r= min(r,_c); 
r= min(r,_d);
r= min(r,_e);
r= min(r,_f);

return r; 

double vet[] = { _a, _b, _c, _d, _e, _f };
double min = vet[0];
for (int i=0; i<(sizeof vet/sizeof *vet ); i++)
{
     if(vet[i] < min){ min = vet[i];}
}
return min;

  double vet[] = { 10,23423,232,2,3,4,5,6,7 };
  int minNo=0;
  for (int i=1;i <(sizeof vet/sizeof *vet );i++)
    if(vet[i] < vet[minNo])
      minNo = i;
  return vet[minNo];

#include <Core/Core.h>

CONSOLE_APP_MAIN {
	int vec[] = { 5, 4, 3, 2, 1, 6, 7, 8, 9, 10 },
		*Upp_value = Upp::MinElement(vec, vec + __countof(vec)),
		*std_value = std::min_element(vec, vec + __countof(vec));

	ASSERT(Upp_value == std_value);

	Upp::Cout() << "Minimum value"
		<< "\nUpp: " << *Upp_value
		<< "\nstd: " << *std_value
		<< "\n\nIndex of minimum value: " << Upp_value - vec << '\n';
}

  double vet[] = { 10,23423,232,2,3,4,5,6,7 };
  int minNo=0;
  for (int i=1;i <(sizeof vet/sizeof *vet );i++)
    if(vet[i] < vet[minNo])
      minNo = i;
  return vet[minNo];