数据结构与算法之Stack（栈）的应用——用stack实现一个计算器-/bin/calc.dart

计算器的bin/calc.dart 可执行代码：

 1 import 'dart:io';
 2 import 'package:data_struct/stack/sample/calculator.dart';
 3 
 4 void main() {
 5   print('please input the expression:');
 6   var ins = stdin.readLineSync();
 7   while (ins != 'exit') {
 8     try {
 9       var r = calc(ins);
10       print('\n the result is: $r');
11     } on FormatException {
12       print('Format error!');
13     } on Exception catch (e) {
14       print('Unknown error: $e!');
15     }
16 
17     print('\nplease input the expression:');
18     ins = stdin.readLineSync();
19   }
20 }

 

转载于:https://www.cnblogs.com/outerspace/p/10272872.html