Fix/tutorial 10

tutorial-10/ERC20.sol

@@ -1,8 +1,8 @@
 pragma solidity ^0.4.0;
 
 interface ERC20 {
-    function transferFrom(address _from, address _to, uint _value) public returns (bool);
-    function approve(address _spender, uint _value) public returns (bool);
-    function allowance(address _owner, address _spender) public constant returns (uint);
+    function transferFrom(address _from, address _to, uint _value) external returns (bool);
+    function approve(address _spender, uint _value) external returns (bool);
+    function allowance(address _owner, address _spender) external constant returns (uint);
     event Approval(address indexed _owner, address indexed _spender, uint _value);
-}
+}

tutorial-10/ERC223.sol

@@ -3,4 +3,4 @@ pragma solidity ^0.4.0;
 interface ERC223 {
     function transfer(address _to, uint _value, bytes _data) public returns (bool);
     event Transfer(address indexed from, address indexed to, uint value, bytes indexed data);
-}
+}

tutorial-10/MyFirstToken.sol

@@ -7,7 +7,7 @@ import "browser/ERC223ReceivingContract.sol";
 
 contract MyFirstToken is Token("MFT", "My First Token", 18, 1000), ERC20, ERC223 {
 
-    function MyFirstToken() public {
+    constructor() public {
         _balanceOf[msg.sender] = _totalSupply;
     }
 
@@ -25,7 +25,7 @@ contract MyFirstToken is Token("MFT", "My First Token", 18, 1000), ERC20, ERC223
             !isContract(_to)) {
             _balanceOf[msg.sender] -= _value;
             _balanceOf[_to] += _value;
-            Transfer(msg.sender, _to, _value);
+            emit Transfer(msg.sender, _to, _value);
             return true;
         }
         return false;
@@ -39,13 +39,13 @@ contract MyFirstToken is Token("MFT", "My First Token", 18, 1000), ERC20, ERC223
             _balanceOf[_to] += _value;
             ERC223ReceivingContract _contract = ERC223ReceivingContract(_to);
                 _contract.tokenFallback(msg.sender, _value, _data);
-            Transfer(msg.sender, _to, _value, _data);
+            emit Transfer(msg.sender, _to, _value, _data);
             return true;
         }
         return false;
     }
 
-    function isContract(address _addr) returns (bool) {
+    function isContract(address _addr) public view returns (bool) {
         uint codeSize;
         assembly {
             codeSize := extcodesize(_addr)
@@ -61,19 +61,19 @@ contract MyFirstToken is Token("MFT", "My First Token", 18, 1000), ERC20, ERC223
             _balanceOf[_from] -= _value;
             _balanceOf[_to] += _value;
             _allowances[_from][msg.sender] -= _value;
-            Transfer(_from, _to, _value);
+            emit Transfer(_from, _to, _value);
             return true;
         }
         return false;
     }
 
     function approve(address _spender, uint _value) public returns (bool) {
         _allowances[msg.sender][_spender] = _value;
-        Approval(msg.sender, _spender, _value);
+        emit Approval(msg.sender, _spender, _value);
         return true;
     }
 
     function allowance(address _owner, address _spender) public constant returns (uint) {
         return _allowances[_owner][_spender];
     }
-}
+}

tutorial-10/Token.sol

@@ -8,7 +8,7 @@ contract Token {
     mapping (address => uint) internal _balanceOf;
     mapping (address => mapping (address => uint)) internal _allowances;
 
-    function Token(string symbol, string name, uint8 decimals, uint totalSupply) public {
+    constructor(string symbol, string name, uint8 decimals, uint totalSupply) public {
         _symbol = symbol;
         _name = name;
         _decimals = decimals;
@@ -34,4 +34,4 @@ contract Token {
     function balanceOf(address _addr) public constant returns (uint);
     function transfer(address _to, uint _value) public returns (bool);
     event Transfer(address indexed _from, address indexed _to, uint _value);
-}
+}