Flutter数学运算插件flutter_math_operations_kishan_raval的使用

Flutter数学运算插件flutter_math_operations_kishan_raval的使用

A library for basic arithmetic calculations in Flutter, including addition, subtraction, multiplication, and division.

使用方法

要使用此包，请在你的pubspec.yaml文件中添加flutter_math_operations_kishan_raval作为依赖项。

dependencies:
  flutter:
    sdk: flutter
  flutter_math_operations_kishan_raval: ^0.0.2

完整示例代码

以下是一个完整的示例代码，演示如何在Flutter应用中使用flutter_math_operations_kishan_raval进行基本的算术运算。

首先，确保你已经在pubspec.yaml文件中添加了依赖项，然后运行flutter pub get来安装依赖项。

import 'package:flutter/material.dart';
import 'package:flutter_math_operations_kishan_raval/flutter_math_operations_kishan_raval.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter 数学运算插件示例'),
        ),
        body: Center(
          child: ArithmeticOperations(),
        ),
      ),
    );
  }
}

class ArithmeticOperations extends StatefulWidget {
  [@override](/user/override)
  _ArithmeticOperationsState createState() => _ArithmeticOperationsState();
}

class _ArithmeticOperationsState extends State<ArithmeticOperations> {
  double result = 0;
  double num1 = 0;
  double num2 = 0;

  void performAddition() {
    setState(() {
      result = MathOperations.add(num1, num2);
    });
  }

  void performSubtraction() {
    setState(() {
      result = MathOperations.subtract(num1, num2);
    });
  }

  void performMultiplication() {
    setState(() {
      result = MathOperations.multiply(num1, num2);
    });
  }

  void performDivision() {
    setState(() {
      result = MathOperations.divide(num1, num2);
    });
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(16.0),
      child: Column(
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          TextField(
            decoration: InputDecoration(labelText: '输入第一个数字'),
            keyboardType: TextInputType.number,
            onChanged: (value) {
              num1 = double.parse(value);
            },
          ),
          TextField(
            decoration: InputDecoration(labelText: '输入第二个数字'),
            keyboardType: TextInputType.number,
            onChanged: (value) {
              num2 = double.parse(value);
            },
          ),
          SizedBox(height: 20),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: [
              ElevatedButton(
                onPressed: performAddition,
                child: Text('+'),
              ),
              ElevatedButton(
                onPressed: performSubtraction,
                child: Text('-'),
              ),
            ],
          ),
          SizedBox(height: 20),
          Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: [
              ElevatedButton(
                onPressed: performMultiplication,
                child: Text('*'),
              ),
              ElevatedButton(
                onPressed: () {
                  if (num2 != 0) {
                    performDivision();
                  } else {
                    setState(() {
                      result = 0; // 避免除以零的情况
                    });
                  }
                },
                child: Text('/'),
              ),
            ],
          ),
          SizedBox(height: 20),
          Text(
            '结果: $result',
            style: TextStyle(fontSize: 20),
          ),
        ],
      ),
    );
  }
}