Solidity学习笔记

UINT 是 UINT256的别名

INT是INT256的别名

uint and int are aliases for uint256 and int256, respectively.

Solidity 中整型有明确范围，例如 uint32 的范围是 0 ~ 2**32-1 , 若结果超过范围 会被truncate截断

address 类型  存放一个20字节的以太坊地址

address payable  类似于address ，且提供 transfer 和 send成员 ;   即 普通address默认不能传输ETH ， address payable 可以

pragma solidity 0.5.10;


contract Test1 {
    
    address public notpaybleaddress;
    address      public payableaddress;
    uint public balance1;
    uint public balance2;
    uint public balance3;
    
    constructor() public payable {
        notpaybleaddress = msg.sender;
        payableaddress=address(0);
        balance1= address(msg.sender).balance;
        balance2= address(0xAb8483F64d9C6d1EcF9b849Ae677dD3315835cb2).balance;
        balance3= address(this).balance;

    }
    
    
    function test1() public payable {
       address payable x = address(0xAb8483F64d9C6d1EcF9b849Ae677dD3315835cb2);
 
 
      x.transfer(1 ether);
 
        balance1= address(msg.sender).balance;
        balance2= address(0xAb8483F64d9C6d1EcF9b849Ae677dD3315835cb2).balance;
        balance3= address(this).balance;
      
 
      
    }
    
    
}