public static TFract operator +(int n, TFract a)
{
TFract b = new TFract();
TFract c = new TFract();
b.SetNum(n); b.SetDen(1);
c = b + a;
return(c);
}
public static TFract operator +(TFract a, int n)
{
TFract b = new TFract();
TFract c = new TFract();
b.SetNum(n); b.SetDen(1);
c = a + b;
return(c);
}