simple win 32 console apps

#include
main ()
{
float y1, y2, avgy;
float avg(float, float);
y1 = 5.0;
y2 = 7.0;
avgy = avg(y1, y2);
cout << "\n The Average = "<< avgy;
return 0;
}
float avg(float x1, float x2)
{
float avgx;
avgx = (x1 + x2)/2;
return avgx;
}