//****************************************************************************************************
public override bool MoreThan(SingleVar b) {
if (!b.IsString())
throw new CalcException("Ќеправильные операнды.");
else {
return b.ToString().CompareTo(m_val) < 0;
}
}
//****************************************************************************************************
public override SingleVar add(SingleVar b) {
return new StringVar(this.m_val + b.ToString());
}