EDUCoin - ERC20 Tocken by Dr B P Sharma

pragma solidity >=0.4.22 <0.7.0;
abstract contract ERC20Interface {
   function totalSupply() virtual public view returns (uint);

    function balanceOf(address tokenOwner) virtual public view returns (uint balance);
 
function allowance (address tokenOwner, address spender) virtual public view returns (uint remaining);

    function transfer(address to, uint tokens) virtual public returns (bool success);
 
function approve(address spender, uint tokens) virtual public returns (bool success);

    function transferFrom (address from, address to, uint tokens) virtual 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 EDUCoin is ERC20Interface {
    string public name;
    string public symbol;
    uint8 public decimals;
 
    uint256 private _totalSupply;
 
    mapping(address => uint) balances;
    mapping(address => mapping(address => uint)) allowed;

    constructor() public {
        name = "EDUCoin";
        symbol = "EDU";
        decimals = 18;
     
        _totalSupply = 100000000000000000000000000;
     
        balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }
 
    function totalSupply() override  public view returns (uint) {
        return _totalSupply - balances[address(0)];
    }
 
    function balanceOf(address tokenOwner) override  public view returns (uint balance) {
        return balances[tokenOwner];
    }
 
    function allowance (address tokenOwner, address spender) override public view returns (uint remaining) {
        return allowed[tokenOwner][spender];
    }
 
    function approve(address spender, uint tokens) override public returns (bool success) {
        allowed[msg.sender][spender] = tokens;
        emit Approval(msg.sender, spender, tokens);
        return true;
    }
 
    function transfer(address to, uint tokens) override public returns (bool success) {
        balances[msg.sender] = safeSub(balances[msg.sender], tokens);
        balances[to] = safeAdd(balances[to], tokens);

        emit Transfer(msg.sender, to, tokens);
        return true;
    }
    function safeAdd(uint a, uint b) private pure returns (uint c) {
        c = a + b;
        require(c >= a);
    }
    function safeSub(uint a, uint b) private pure returns (uint c) {
        require(b <= a);
        c = a - b;
    }
    function safeMul(uint a, uint b) private pure returns (uint c) {
        c = a * b;
        require(a == 0 || c / a == b);
    }
    function safeDiv(uint a, uint b) private pure returns (uint c) {
        require(b > 0);
        c = a / b;
    }
    function transferFrom(address from, address to, uint tokens) override public returns (bool success) {
        balances[from] = safeSub(balances[from], tokens);
        allowed[from][msg.sender] = safeSub(allowed[from][msg.sender], tokens);
        balances[to] = safeAdd(balances[to], tokens);
        emit Transfer(from, to, tokens);
        return true;
    }
}


Ethereum Account ID
0x9dbc13cb7E68C578D856DCA8DF35F94c04219c48



Ropsten Ethereum Faucet
https://faucet.dimensions.network/

Contact Deployed
https://ropsten.etherscan.io/token/0xa58631699ca1cfa21aa6e18dbb717c762b4aeff4

For more reading
https://blockonomi.com/create-ethereum-token/
https://axom-software.com/en/blog/2019/07/blockchain/1562846735/create-your-own-ethereum-erc20-token