Dart编程实例 - typedef 类型定义

本文为大家分享 Dart编程实例 - typedef 类型定义 的具体示例代码，提供大家参考，具体内容如下：

typedef ManyOperation(int firstNo , int secondNo); //function signature  
Add(int firstNo,int second){
   print("Add result is ${firstNo+second}");
}
Subtract(int firstNo,int second){
   print("Subtract result is ${firstNo-second}");
}
Divide(int firstNo,int second){
   print("Divide result is ${firstNo/second}");
}  
Calculator(int a, int b, ManyOperation oper){
   print("Inside calculator");
   oper(a,b);
}  
void main(){
   ManyOperation oper = Add;
   oper(10,20);
   oper = Subtract;
   oper(30,20);
   oper = Divide;
   oper(50,5);
}

本文为大家分享 Dart编程实例 - 导入和使用库 的具体示例代码，提供大家参考，具体内容如下：import 'dart:math';void main() { print("Square root of ...