public PrgState(ADT.IDictionary <string, int> s, IExeStack <Statement> exe, IOutput <int> o, IFileTable <int, FileData> ft)
{
this.symbolTable = s;
this.exeStack = exe;
this.output = o;
this.filetable = ft;
}
public PrgState Execute(PrgState p)
{
ADT.IDictionary <string, int> dict = p.Dict;
int val = this.expr.Eval(dict);
if (val != 0)
{
p.Stack.Push(thenstmt);
}
else
{
p.Stack.Push(elsestmt);
}
return(p);
}
public int Eval(ADT.IDictionary <string, int> dict)
{
int resl = this.left.Eval(dict);
int resr = this.right.Eval(dict);
if (this.op == '+')
{
return(resl + resr);
}
else if (this.op == '-')
{
return(resl - resr);
}
else if (this.op == '*')
{
return(resl * resr);
}
else if (this.op == '%')
{
if (resr == 0)
{
throw new DivideByZeroException("Division by 0");
}
else
{
return(resl % resr);
}
}
else
{
if (resr == 0)
{
throw new DivideByZeroException("Division by 0");
}
else
{
return(resl / resr);
}
}
}
public int Eval(ADT.IDictionary <string, int> dict)
{
return(dict.getValue(this.varName));
}
public int Eval(ADT.IDictionary <string, int> dict)
{
return(this.value);
}
