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Undeclared identifier ‘balances’

How do I fix the undeclared identifier balances[msg.sender] = 1000000000000000000000000000; in the below code pragma solidity ^0.4.4; contract Token { /// @return total amount of tokens function totalSupply() constant returns (uint256 supply) {} /// @param _owner The address from which the balance will be retrieved /// @return The balance function balanceOf(address _owner) constant returns (uint256::Listen

How do I fix the undeclared identifier balances[msg.sender] = 1000000000000000000000000000; in the below code

pragma solidity ^0.4.4;  contract Token {      /// @return total amount of tokens     function totalSupply() constant returns (uint256 supply) {}      /// @param _owner The address from which the balance will be retrieved     /// @return The balance     function balanceOf(address _owner) constant returns (uint256 balance) {}      /// @notice send `_value` token to `_to` from `msg.sender`     /// @param _to The address of the recipient     /// @param _value The amount of token to be transferred     /// @return Whether the transfer was successful or not     function transfer(address _to, uint256 _value) returns (bool success) {}      /// @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`     /// @param _from The address of the sender     /// @param _to The address of the recipient     /// @param _value The amount of token to be transferred     /// @return Whether the transfer was successful or not     function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {}      /// @notice `msg.sender` approves `_addr` to spend `_value` tokens     /// @param _spender The address of the account able to transfer the tokens     /// @param _value The amount of wei to be approved for transfer     /// @return Whether the approval was successful or not     function approve(address _spender, uint256 _value) returns (bool success) {}      /// @param _owner The address of the account owning tokens     /// @param _spender The address of the account able to transfer the tokens     /// @return Amount of remaining tokens allowed to spent     function allowance(address _owner, address _spender) constant returns (uint256 remaining) {}      event Transfer(address indexed _from, address indexed _to, uint256 _value);     event Approval(address indexed _owner, address indexed _spender, uint256 _value);  }  contract StandardToken {      function transfer(address _to, uint256 _value) returns (bool success) {         //Default assumes totalSupply can't be over max (2^256 - 1).         //If your token leaves out totalSupply and can issue more tokens as time goes on, you need to check if it doesn't wrap.         //Replace the if with this one instead.         //if (balances[msg.sender] >= _value && balances[_to] + _value > balances[_to]) {         if (balances[msg.sender] >= _value && _value > 0) {             balances[msg.sender] -= _value;             balances[_to] += _value;             transfer(msg.sender, _to, _value);             return true;         } else { return false; }     }      function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {         //same as above. Replace this line with the following if you want to protect against wrapping uints.         //if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value > balances[_to]) {         if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {             balances[_to] += _value;             balances[_from] -= _value;             allowed[_from][msg.sender] -= _value;             transfer(_from, _to, _value);             return true;         } else { return false; }     }      function balanceOf(address _owner) constant returns (uint256 balance) {         return balances[_owner];     }      function approve(address _spender, uint256 _value) returns (bool success) {         allowed[msg.sender][_spender] = _value;         approve(msg.sender, _spender, _value);         return true;     }      function allowance(address _owner, address _spender) constant returns (uint256 remaining) {       return allowed[_owner][_spender];     }      mapping (address => uint256) balances;     mapping (address => mapping (address => uint256)) allowed;     uint256 public totalSupply; }  contract NMR { // CHANGE THIS. Update the contract name.      /* Public variables of the token */      /*     NOTE:     The following variables are OPTIONAL vanities. One does not have to include them.     They allow one to customise the token contract & in no way influences the core functionality.     Some wallets/interfaces might not even bother to look at this information.     */     string public name;                   // Token Name     uint8 public decimals;                // How many decimals to show. To be standard complicant keep it 18     string public symbol;                 // An identifier: eg SBX, XPR etc..     string public version = 'H1.0';      uint256 public unitsOneEthCanBuy;     // How many units of your coin can be bought by 1 ETH?     uint256 public totalEthInWei;         // WEI is the smallest unit of ETH (the equivalent of cent in USD or satoshi in BTC). We'll store the total ETH raised via our ICO here.       address public fundsWallet;           // Where should the raised ETH go?        // This is a constructor function      // which means the following function name has to match the contract name declared above     function NMRToken() {         balances[msg.sender] = 1000000000000000000000000000;    // Give the creator all initial tokens. This is set to 1000 for example. If you want your initial tokens to be X and your decimal is 5, set this value to X * 100000. (CHANGE THIS)         totalSupply = 1000000000000000000000000000;                        // Update total supply (1000 for example) (CHANGE THIS)         name = "NMRToken";                                   // Set the name for display purposes (CHANGE THIS)         decimals = 18;                                               // Amount of decimals for display purposes (CHANGE THIS)         symbol = "NMR";                                             // Set the symbol for display purposes (CHANGE THIS)         unitsOneEthCanBuy = 10000;                                      // Set the price of your token for the ICO (CHANGE THIS)         fundsWallet = msg.sender;                                    // The owner of the contract gets ETH     }      function() payable{         totalEthInWei = totalEthInWei + msg.value;         uint256 amount = msg.value * unitsOneEthCanBuy;         require(balances[fundsWallet] >= amount);          balances[fundsWallet] = balances[fundsWallet] - amount;         balances[msg.sender] = balances[msg.sender] + amount;          Transfer(fundsWallet, msg.sender, amount); // Broadcast a message to the blockchain          //Transfer ether to fundsWallet         fundsWallet.transfer(msg.value);                                    }      /* Approves and then calls the receiving contract */     function approveAndCall(address _spender, uint256 _value, bytes _extraData) returns (bool success) {         allowed[msg.sender][_spender] = _value;         Approval(msg.sender, _spender, _value);          //call the receiveApproval function on the contract you want to be notified. This crafts the function signature manually so one doesn't have to include a contract in here just for this.         //receiveApproval(address _from, uint256 _value, address _tokenContract, bytes _extraData)         //it is assumed that when does this that the call *should* succeed, otherwise one would use vanilla approve instead.         if(!_spender.call(bytes4(bytes32(sha3("receiveApproval(address,uint256,address,bytes)"))), msg.sender, _value, this, _extraData)) { require; }         return true;     } } 

The crypto industry is still waiting for its ‘iPhone moment’

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