public PrgState oneStep(PrgState prgState)
{
MyIStack <IStmt> exeStack = prgState.getExeStack();
if (exeStack.isEmpty())
{
throw new Exception("stack is empty");
}
return(exeStack.pop().execute(prgState));
}
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); }
}
private PrgState oneStep(PrgState state)
{
MyIStack <IStmt> stk = state.getStk();
if (stk.isEmpty())
{
throw new MyStmtExecException("The stack is empty");
}
IStmt crtStmt = stk.pop();
try {
return(crtStmt.execute(state));
}
catch (MyException ex)
{
throw new MyStmtExecException("" + ex);
}
}