public int evaluate(ISymbolTable <string, int> s)
{
if (s.contains(this.name))
{
return(s.getValue(this.name));
}
else
{
throw new IException("no such variable " + this.name);
}
}
public PrgState execute(PrgState p)
{
ISymbolTable <string, int> t = p.getSymbolTable();
int resExpr = this.expr.evaluate(t);
if (t.contains(var))
{
t.setValue(var, resExpr);
}
else
{
t.add(var, resExpr);
}
return(p);
}