Initial commit

test/aggregation/list.dart

@@ -0,0 +1,38 @@
+void main() {
+  foo4();
+}
+
+void foo1() {
+  List<int> numList = [1, 9, 9, 4, 3, 2, 8];
+  int second = numList[1];
+  print(second);
+  numList[3] = 6;
+  print(numList);
+}
+
+void foo2() {
+  List<int> numList = [1, 9, 9, 4, 3, 2, 8];
+  numList.add(10);
+  numList.insert(0, 49);
+  print(numList);
+}
+
+void foo3() {
+  List<int> numList = [1, 9, 9, 4, 3, 2, 8];
+  numList.removeAt(2);
+  numList.remove(3);
+  numList.removeLast();
+  print(numList);
+}
+
+void foo4() {
+  List<int> numList = [1, 9, 9, 4,];
+  for (int i = 0; i < numList.length; i++) {
+    int value = numList[i];
+    print("索引:$i, 元素值:$value");
+  }
+
+  for(int value in numList){
+    print("元素值:$value");
+  }
+}

test/aggregation/map.dart

@@ -0,0 +1,37 @@
+void main() {
+  foo3();
+}
+
+void foo1() {
+  Map<int, String> numMap = {
+    0: 'zero',
+    1: 'one',
+    2: 'two',
+  };
+  print(numMap);
+  numMap.remove(1);
+  print(numMap);
+}
+
+void foo2() {
+  Map<int, String> numMap = {
+    0: 'zero',
+    1: 'one',
+    2: 'two',
+  };
+  numMap[3] = 'three';
+  numMap[4] = 'four';
+  print(numMap);
+}
+
+void foo3() {
+  Map<int, String> numMap = {
+    0: 'zero',
+    1: 'one',
+    2: 'two',
+  };
+  numMap.forEach((key, value) {
+    print("${key} = $value");
+  });
+}
+

test/aggregation/set.dart

@@ -0,0 +1,30 @@
+void main() {
+  foo3();
+}
+
+void foo1() {
+  Set<int> numSet = {1, 9, 9, 4};
+  print(numSet);
+}
+
+void foo2() {
+  Set<int> numSet = {1, 9, 4};
+  numSet.add(10);
+  numSet.remove(9);
+  print(numSet);
+}
+
+void foo3() {
+  Set<int> a = {1, 9, 4};
+  Set<int> b = {1, 9, 3};
+  print(a.difference(b));// 差集
+  print(a.union(b)); // 并集
+  print(a.intersection(b)); // 交集
+}
+
+void foo4() {
+  Set<int> numSet = {1, 9, 4};
+  for(int value in numSet){
+    print("元素值:$value");
+  }
+}

test/grammer/base.dart

@@ -0,0 +1,149 @@
+void main() {
+  // ---->[break情景]----
+  for (int i = 0; i < 10; i++) {
+    if (i % 3 == 2) {
+      break; //直接跳出循环
+    }
+    print("i:$i"); //打印了0，1
+  }
+
+  // ---->[continue情景]----
+  for (int i = 0; i < 10; i++) {
+    if (i % 3 == 2) {
+      continue; //跳出本次循环，将进入下次循环
+    }
+    print("i:$i"); //打印了 0，1，3，4，6，7，9
+  }
+}
+
+void main13() {
+  int sum = 0;
+  int i = 0;
+  do {
+    sum += i;
+    print("第 $i 次执行,sum = $sum");
+    i = i + 1;
+  } while (i < 5);
+}
+
+void main12() {
+  int sum = 0;
+  int i = 0;
+  while (i < 5) {
+    sum += i;
+    print("第 $i 次执行,sum = $sum");
+    i = i + 1;
+  }
+}
+
+void main11() {
+  int sum = 0;
+  for (int i = 0; i < 5; i = i + 1) {
+    sum += i;
+    print("第 $i 次执行,sum = $sum");
+  }
+}
+
+void main10() {
+  String mark = 'A';
+  switch (mark) {
+    case 'A':
+      print("优秀");
+      break;
+    case 'B':
+      print("良好");
+      break;
+    case 'C':
+      print("普通");
+      break;
+    case 'D':
+      print("较差");
+      break;
+    case 'E':
+      print("极差");
+      break;
+    default:
+      print("未知等级");
+  }
+}
+
+void main9() {
+  double height = 1.18;
+  // 布尔值可以通过运算获得
+  bool free = height < 1.2;
+  if (free) {
+    print("可免费入园");
+  } else {
+    print("请购买门票");
+  }
+}
+
+// 逻辑运算符
+void main8() {
+  // 公园是否开放
+  bool open = true;
+  // 公园是否开放
+  bool free = false;
+
+  // 公园是否免费开放
+  bool freeEnter = open && free;
+}
+
+// 算术运算符
+void main7() {
+  print(1 > 2); //false   大于
+  print(1 < 2); //true    小于
+  print(1 == 2); //false  等于
+  print(1 != 2); //true   不等
+  print(10 >= 3); //true  大于等于
+  print(10 <= 3); //false 小于等于
+}
+
+// 比较运算符
+void main6() {
+  print(1 + 2); //3    加
+  print(1 - 2); //-1   减
+  print(1 * 2); //2    乘
+  print(1 / 2); //0.5  除
+  print(10 % 3); //1   余
+  print(10 ~/ 3); //3  商
+}
+
+void main5() {
+  // 直接赋值
+  bool enable = true;
+  double height = 1.18;
+  // 布尔值可以通过运算获得
+  bool free = height < 1.2;
+}
+
+void main4() {
+  double a = 2.3;
+  double b = 4.5;
+  double c = 2.5;
+
+  double avg = (a + b + c) / 3;
+  String output = '$a,$b,$c 的平均值是$avg';
+  // String output = '$a,$b,$c 的平均值是${(a + b + c) / 3}';
+  print(output);
+}
+
+void main3() {
+  String hello1 = 'Hello, World!';
+  String hello2 = "Hello, Flutter!";
+  print(hello1 + hello2);
+}
+
+void main0() {
+  int age = 2;
+  double weight = 4.5;
+}
+
+void main1() {
+  double a = 2.3;
+  double b = 4.5;
+  double c = 2.5;
+
+  double avg = (a + b + c) / 3;
+  print(avg);
+}

test/grammer/function/01.dart

@@ -0,0 +1,20 @@
+void main() {
+  double toly = bmi(1.8, 70);
+  double ls = bmi(1.79, 65);
+  double wy = bmi(1.69, 50);
+
+  print("===toly:$toly===ls:$ls===wy:$wy===");
+}
+
+// void main() {
+//   double toly = 1.8 / (70 * 70);
+//   double ls = 1.79 / (65 * 65);
+//   double wy = 1.69 / (50 * 50);
+//   print("===toly:$toly===ls:$ls===wy:$wy===");
+// }
+
+double bmi(double height, double wight) {
+  // 具体算法
+  double result = wight / (height * height);
+  return result;
+}

test/grammer/function/02.dart

@@ -0,0 +1,23 @@
+void main() {
+  double toly = bmi(weight: 70, height: 1.8);
+  double ls = bmi(height: 1.79);
+  double wy = bmi(height: 1.69, weight: 50);
+
+  print("===toly:$toly===ls:$ls===wy:$wy===");
+}
+
+// void main() {
+//   double toly = 1.8 / (70 * 70);
+//   double ls = 1.79 / (65 * 65);
+//   double wy = 1.69 / (50 * 50);
+//   print("===toly:$toly===ls:$ls===wy:$wy===");
+// }
+
+double bmi({
+  required double height,
+  double weight = 65,
+}) {
+  // 具体算法
+  double result = weight / (height * height);
+  return result;
+}

test/grammer/function/03.dart

@@ -0,0 +1,20 @@
+void main() {
+  double toly = bmi(70, 1.8);
+  double ls = bmi();
+  double wy = bmi(1.69);
+
+  print("===toly:$toly===ls:$ls===wy:$wy===");
+}
+
+// void main() {
+//   double toly = 1.8 / (70 * 70);
+//   double ls = 1.79 / (65 * 65);
+//   double wy = 1.69 / (50 * 50);
+//   print("===toly:$toly===ls:$ls===wy:$wy===");
+// }
+
+double bmi([double height = 1.79, double weight = 65]) {
+  // 具体算法
+  double result = weight / (height * height);
+  return result;
+}

test/grammer/oop/01.dart

@@ -0,0 +1,14 @@
+class Human {
+  String name = '';
+  double weight = 0;
+  double height = 0;
+}
+
+void main(){
+  Human toly = Human();
+  toly.name = "捷特";
+  toly.weight = 70;
+  toly.height = 180;
+
+  print("Human: name{${toly.name},weight:${toly.weight}kg,height:${toly.height}cm}");
+}

test/grammer/oop/02.dart

@@ -0,0 +1,12 @@
+class Human {
+  String name = '';
+  double weight = 0;
+  double height = 0;
+
+  Human(this.name,this.weight,this.height);
+}
+
+void main(){
+  Human toly = Human("捷特",70,180);
+  print("Human: name{${toly.name},weight:${toly.weight}kg,height:${toly.height}cm}");
+}

test/grammer/oop/03.dart

@@ -0,0 +1,52 @@
+class Human {
+  String name = '';
+  double weight = 0;
+  double height = 0;
+
+  Human(this.name, this.weight, this.height);
+
+  String info() {
+    return "Human: name{${name},weight:${weight}kg,height:${height}cm}";
+  }
+}
+
+void main() {
+  Human toly = Human("捷特", 70, 180);
+  print(toly.info());
+
+  Human ls = Human("龙少", 65, 179);
+  print(ls.info());
+
+  Human wy = Human("巫缨", 65, 179);
+  print(wy.info());
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

test/grammer/oop/04.dart

@@ -0,0 +1,40 @@
+class Human {
+  String name = '';
+  double weight = 0;
+  double height = 0;
+
+  Human(this.name, this.weight, this.height);
+
+  double bmi() {
+    double result = weight / ((height/100) * (height/100));
+    return result;
+  }
+
+  String info() {
+    return "Human: name{${name},weight:${weight}kg,height:${height}cm}";
+  }
+}
+
+class Student extends Human {
+  final String school;
+
+  Student(
+    super.name,
+    super.weight,
+    super.height, {
+    required this.school,
+  });
+
+  @override
+  String info() {
+    String info = super.info() + "school: $school ";
+    return info;
+  }
+
+}
+
+void main() {
+  Student toly = Student("捷特", 70, 180,school: "安徽建筑大学");
+  print(toly.bmi());
+  print(toly.info());
+}

test/widget_test.dart

@@ -0,0 +1,30 @@
+// This is a basic Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility in the flutter_test package. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:flutter_first_station/main.dart';
+
+void main() {
+  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    await tester.pumpWidget(const MyApp());
+
+    // Verify that our counter starts at 0.
+    expect(find.text('0'), findsOneWidget);
+    expect(find.text('1'), findsNothing);
+
+    // Tap the '+' icon and trigger a frame.
+    await tester.tap(find.byIcon(Icons.add));
+    await tester.pump();
+
+    // Verify that our counter has incremented.
+    expect(find.text('0'), findsNothing);
+    expect(find.text('1'), findsOneWidget);
+  });
+}