public ProgState execute(ProgState prog)
{
MyIStack <IStmt> stk = prog.getStk();
stk.push(st2);
stk.push(st1);
return(prog);
}
public ProgState onestep(ProgState prog)
{
MyIStack <IStmt> stk = prog.getStk();
try { stk.isEmpty(); }
catch (StackExceptions) { throw new StmtExecException("The program is over!!! \n"); }
IStmt st = stk.pop();
if (flag == 1)
{
System.Console.WriteLine(st.ToString());
}
try { return(st.execute(prog)); }
catch (ControllerException e) { throw new StmtExecException(e); }
}
public ProgState execute(ProgState prog)
{
MyIStack <IStmt> stk = prog.getStk();
MyIDictionary <string, int> dict = prog.getDict();
try {
if (ex.eval(dict) > 0)
{
stk.push(thenS);
}
else
{
stk.push(elseS);
}
} catch (StmtExceptions e) {
throw new ControllerException(e);
}
return(prog);
}
