JointEDU_Token.txt

pragma solidity ^0.4.18;
   
  // Under copy right of Joint Education Limited Partnership
  //www.jointedu.net
  
  library SafeMath {
      function add(uint a, uint b) internal pure returns (uint c) {
          c = a + b;
          require(c >= a);
      }
      function sub(uint a, uint b) internal pure returns (uint c) {
         require(b <= a);
          c = a - b;
      }
      function mul(uint a, uint b) internal pure returns (uint c) {
          c = a * b;
          require(a == 0 || c / a == b);
      }
      function div(uint a, uint b) internal pure returns (uint c) {
          require(b > 0);
          c = a / b;
      }
  }
  
  
 
  contract ERC20Interface {
      function totalSupply() public constant returns (uint);
      function balanceOf(address tokenOwner) public constant returns (uint balance);
      function allowance(address tokenOwner, address spender) public constant returns (uint remaining);
      function transfer(address to, uint tokens) public returns (bool success);
      function approve(address spender, uint tokens) public returns (bool success);
      function transferFrom(address from, address to, uint tokens) public returns (bool success);
  
      event Transfer(address indexed from, address indexed to, uint tokens);
      event Approval(address indexed tokenOwner, address indexed spender, uint tokens);
  }
  
  
  
  contract ApproveAndCallFallBack {
      function receiveApproval(address from, uint256 tokens, address token, bytes data) public;
  }
 
  
  
  contract Owned {
      address public owner;
      address public newOwner;
  
      event OwnershipTransferred(address indexed _from, address indexed _to);
  
      function Owned() public {
          owner = msg.sender;
      }
  
      modifier onlyOwner {
          require(msg.sender == owner);
          _;
      }
  
      function transferOwnership(address _newOwner) public onlyOwner {
          newOwner = _newOwner;
      }
      function acceptOwnership() public {
          require(msg.sender == newOwner);
          OwnershipTransferred(owner, newOwner);
          owner = newOwner;
          newOwner = address(0);
      }
  }
  
  
 
 contract JointEDU is ERC20Interface, Owned {
     using SafeMath for uint;
 
     string public symbol= "JOI";
     string public  name = "JointEDU";
     uint8 public decimals;
     uint public _totalSupply;
     uint256 public constant RATE = 10000;
 
     mapping(address => uint) balances;
     mapping(address => mapping(address => uint)) allowed;
 
 
    
     function JointEDU() public {
         symbol = "JOI";
         name = "JointEDU";
         decimals = 18;
         _totalSupply = 270000000 * 10**uint(decimals);
         balances[owner] = _totalSupply;
         Transfer(address(0), owner, _totalSupply);
     }
 
 
     
     function totalSupply() public constant returns (uint) {
         return _totalSupply  - balances[address(0)];
     }
 
 
     function balanceOf(address tokenOwner) public constant returns (uint balance) {
         return balances[tokenOwner];
     }
 
 
     function transfer(address to, uint tokens) public returns (bool success) {
         balances[msg.sender] = balances[msg.sender].sub(tokens);
         balances[to] = balances[to].add(tokens);
         Transfer(msg.sender, to, tokens);
         return true;
     }
 
 
    
     function approve(address spender, uint tokens) public returns (bool success) {
         allowed[msg.sender][spender] = tokens;
         Approval(msg.sender, spender, tokens);
         return true;
     }
 
 
     
     function transferFrom(address from, address to, uint tokens) public returns (bool success) {
         balances[from] = balances[from].sub(tokens);
         allowed[from][msg.sender] = allowed[from][msg.sender].sub(tokens);
         balances[to] = balances[to].add(tokens);
         Transfer(from, to, tokens);
         return true;
     }
 
      
     function allowance(address tokenOwner, address spender) public constant returns (uint remaining) {
        return allowed[tokenOwner][spender];
     }
 
 
     
    function approveAndCall(address spender, uint tokens, bytes data) public returns (bool success) {
         allowed[msg.sender][spender] = tokens;
         Approval(msg.sender, spender, tokens);
        ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, this, data);
         return true;
     }
 
      function() payable public{
         creatTokens();
         
     }

    
         function creatTokens()payable public{
         require(msg.value>0 && balances[owner]>=1000000);
         uint256 tokens = msg.value.mul(RATE);
         balances[msg.sender]= balances[msg.sender].add(tokens);
         owner.transfer(msg.value);
         balances[owner] = balances[owner].sub(tokens);
         
     }

    
    
    
 
    
     function transferAnyERC20Token(address tokenAddress, uint tokens) public onlyOwner returns (bool success) {
         return ERC20Interface(tokenAddress).transfer(owner, tokens);
     }
 }