Setup Truffle

truffle unbox pet-shop
ls

EmpAttendance.sol

module.exports = {
// See <http://truffleframework.com/docs/advanced/configuration>
// for more about customizing your Truffle configuration!
networks: {
    development: {
        host: "172.22.6.121",
        port: 8081,
        network_id: "*" ,// Match any network id
        from: "f6e00498350aca1ccf1c62947d8b31bc432a9155",
        gas: 8000000
                }
            }
};

pragma solidity ^0.5.0;
pragma experimental ABIEncoderV2;

contract Owned {

    address owner;

    constructor() public {
        owner = msg.sender;
    }

    modifier onlyOwner {
        require (msg.sender == owner);
        _;
    }
}

contract EmpAttendance is Owned {

    struct employee {
        string empName;
        string empDepartment;
        string [] empAttendance;
    }

    mapping (address => employee) db_empAttendanceRecord;
    address [] db_empAccounts;

    function signUp(string memory _empName , string memory _empDeparment) public {

        employee memory newEmployee = employee(_empName,_empDeparment,new string[](0));

        db_empAttendanceRecord[msg.sender] = newEmployee;
        db_empAccounts.push(msg.sender);
    }

    function markAttendance(string memory _date) public {
        db_empAttendanceRecord[msg.sender].empAttendance.push(_date);
    }

    function viewAttendance() public returns (string [] memory) {
        return db_empAttendanceRecord[msg.sender].empAttendance;
    }

    function viewEmpAttendance(address _empaddress) onlyOwner public returns (string [] memory)
    {
        return db_empAttendanceRecord[_empaddress].empAttendance;
    }

    function viewEmpName(address _empaddress) onlyOwner public returns (string memory)
    {
        return db_empAttendanceRecord[_empaddress].empName;
    }

    function viewEmpAccounts() onlyOwner public returns (address [] memory)
    {
        return db_empAccounts;
    }
}