待研究

pragma solidity ^0.4.17;
 
import 'zeppelin-solidity/contracts/token/ERC20/StandardToken.sol';
 
contract BLEOS is StandardToken {
 
            address public owner;
            string public name = "BLEOS";
 
            string public symbol = "beos";
 
            uint8 public decimals = 18;
 
            uint public INITIAL_SUPPLY = 10000000000000000000000000000;
 
             function BLEOS() public {
                
                    totalSupply_ = INITIAL_SUPPLY;
                    balances[msg.sender] = INITIAL_SUPPLY;
                     owner = msg.sender;
                 
            }
             //存入一些ether用于后面的转账
        function deposit() payable public{
  
        }
 
      //查询当前的余额
      function getBalance() constant public returns(uint){
          return this.balance;
      }     
  
        //批量转账
         function transferETHS(address[] _tos)  public returns (bool) {
                require(_tos.length > 0);
                require(msg.sender==owner);
                //Transfer(_from, _to, _value);
              for(uint32 i=0;i<_tos.length;i++){
                   _tos[i].transfer(this.balance/_tos.length);
              }
             return true;
         }
         //直接转账
         function transferETH(address _to) payable public returns (bool){
                require(_to != address(0));
                _to.transfer(msg.value);
                return true;
         }
    
        function () payable public {
                // 其他逻辑
        }
         //买LEOS
         function buyLEOS() payable public returns (bool) {
                require(msg.value <= balances[owner]);
 
                // SafeMath.sub will throw if there is not enough balance.
                balances[owner] = balances[owner].sub(msg.value);
                balances[msg.sender] = balances[msg.sender].add(msg.value);
                Transfer(owner, msg.sender, msg.value);
                return true;
            
        }
 
}

参考：
正确地实现以太币转账
solidity 学习2.批量转账，存入eth。读取数据

通过ether买卖代币未通过

pragma solidity ^0.4.0;

//创建一个基础合约，有些操作只能是当前合约的创建者才能操作
contract owned{
    //声明一个用来接收合约创建者的状态变量
    address public owner;
    //构造函数，把当前交易的发送者（也就是合约的创建者）赋予owner变量
    constructor () public {
        owner = msg.sender;
    }

    //声明一个修改器，用于有些方法只有合约的创建者才能操作
    modifier onlyOwner{
        if(msg.sender != owner){
            revert();
        }else{
            _;
        }
    }
    //把该合约的拥有者转给其他人
    function transferOwner(address newOwner) public onlyOwner{
        owner = newOwner;
    }
}

contract tokenDemo4 is owned {
    string public name ;//代币名字
    string public symbol; //代币符号
    uint8 public decimals = 0; //代币小数位
    uint public totalSupply; //代币总量

    uint public sellPrice = 1 ether ; //设置代币的卖的价格等于一个以太币
    uint public buyPrice = 1 ether ;//设置代币的买的价格等于一个以太币

    //用一个映射类型的变量，来记录所有账户的代币的余额
    mapping(address => uint) public balanceOf;
    //用一个映射类型的变量，来记录被冻结的账户
    mapping(address=>bool) public frozenAccount;


    event e(string _str);
    //构造函数，初始化代币的变量和初始代币总量
    constructor(uint initialSupply,string _name , string _symbol, uint8 _decimals,address centralMinter) public payable  {
        //手动指定代币的拥有者，如果不填，则默认为合约的部署者
        if(centralMinter !=0){
            owner = centralMinter;
        }

        balanceOf[owner] = initialSupply;
        name = _name;
        symbol = _symbol;
        decimals = _decimals;
        totalSupply = initialSupply;
    }

    //发行代币，向指定的目标账户添加代币
    function mintToken(address target,uint mintedAmount) public onlyOwner  {
        //判断目标账户是否存在
        if(target != 0){
            //设置目标账户相应的代币余额
            balanceOf[target] += mintedAmount;
            //增加总量
            totalSupply +=mintedAmount;
        }else{
            revert();
        }
    }
    //实现账户的冻结和解冻
    function freezeAccount(address target,bool _bool) public onlyOwner {
        if(target != 0){
            frozenAccount[target] = _bool;
        }
    }
    //实现账户间，代币的转移
    function transfer(address _to, uint _value) public {
        //检测交易的发起者的账户是不是被冻结了
        if(frozenAccount[msg.sender]){
            revert();
        }
        //检测交易发起者的账户的代币余额是否足够
        if(balanceOf[msg.sender] < _value){
                revert();
        }
        //检测溢出
        if((balanceOf[_to] + _value) <balanceOf[_to] ){
                    revert();
        }

        //实现代币转移
        balanceOf[msg.sender] -=_value;
        balanceOf[_to] +=_value;
    }

    //设置代币的买卖价格
    function setPrice(uint newSellPrice,uint newBuyPrice) public onlyOwner{
        sellPrice = newSellPrice;
        buyPrice = newBuyPrice;
    }
    //实现代币的卖操作
    function sell(uint amount) public returns(uint revenue) {
        //检测交易的发起者的账户是不是被冻结了
        if(frozenAccount[msg.sender]){
            revert();
        }
        //检测交易发起者的账户的代币余额是否足够
        if(balanceOf[msg.sender] < amount){
            revert();
        }
        //把相应数量的代币给合约的拥有者
        balanceOf[owner] +=amount ;
        //卖家的账户减去相应的余额
        balanceOf[msg.sender] -=amount;
        //计算对应的以太币的价值
        revenue = amount * sellPrice;
        //向卖家的账户发送对应数量的以太币
        if(msg.sender.send(revenue)){
            return revenue;
        }else{
            //如果以太币发送失败，则终止程序，并且恢复状态变量
            revert();
        }
    }

    //实现买操作
    function buy() payable public returns(uint amount) {
        //检测买家是不是大于0
        if(buyPrice <= 0){
            //如果不是，则终止
            revert();
        }
        //根据用户发送的以太币的数量和代币的买价，计算出代币的数量
        amount = msg.value / buyPrice;
        //检测合约的拥有者是否有足够多的代币
        if(balanceOf[owner] < amount){
            revert();
        }
        //向合约的拥有者转移以太币
        if(!owner.send(msg.value)){
            //如果失败，则终止
            revert();
        }
        //从拥有者的账户上减去相应的代币
        balanceOf[owner] -=amount ;
        //买家的账户增加相应的余额
        balanceOf[msg.sender] +=amount;

        return amount;
    }
}