DonSHack

pragma solidity ^0.4.24;

contract EC1{
    address private owner;
    struct Certificate{
        string cource_name;
        string performance;
        string grade;
        string issued_date;
    }

DonSHack

{
	"deploy": {
		"VM:-": {
			"linkReferences": {},
			"autoDeployLib": true
		},
		"main:1": {
			"linkReferences": {},
			"autoDeployLib": true
		},

DonSHack

pragma solidity ^0.4.24;

contract Election{
    address private owner;
    
    struct Candidate{
        string name;
        address acc_address;
        uint256 num_of_votes;
    }

DonSHack

pragma solidity ^0.4.24;

contract Election{
    address private owner;
    
    struct Candidate{
        string name;
        address acc_address;
        uint256 num_of_votes;
    }

DonSHack

pragma solidity ^0.5.1;

contract Bank{
    address private owner;
    constructor() public {
        owner = msg.sender;
    }
    modifier isValid() {
        require(owner == msg.sender);
        _;

DonSHack

pragma solidity ^0.5.1;

interface Interface {
    function check() external returns (bool);
    function loan() external returns (bool);
}
//inheritance
contract Parent is Interface{
    //constructor
    constructor(uint val) public {

DonSHack

pragma solidity ^0.5.1;
//inheritance
contract Parent{
    //constructor
    constructor(uint val) public {
        privateValue = val;
    }
    //protected modifire
    uint internal internalValue;
    //private modifire

DonSHack

pragma solidity ^0.5.1;

contract MyFirstContract {
    string public name;
    uint public age;
    function setName(string memory newName) public {
        name = newName;
    }
    function getName() public returns (string memory){
        return name;