MyFirstContract.sol

pragma solidity ^0.4.0;

interface Regulator{
    function checkValue(uint amount) returns (bool);
    function loan() returns (bool);
}

contract bank is Regulator{
    uint private value;
    
    function bank(uint amount) {
        value = amount;
    }
    
    function deposit(uint amount){
        value += amount;
    }
    
    function withdraw(uint amount){
        if(checkValue(amount)){
            value -= amount;
        }
    }
    
    function balance() returns (uint){
        return value;
    }
    
    function checkValue(uint amount) returns (bool){
        return amount >= value;    
    }
    
    function loan() returns (bool){
        return value > 0;
    }
}

contract MyFirstContract is bank(10){
    string private name;
    uint private age;
    
    function setName(string newName) {
        name = newName;
    }
    
    function getName() returns (string) {
        return name;
    }
    
    function setAge(uint newAge) {
        age = newAge;
    }
    
    function getAge() returns(uint) {
        return age;
    }
    
    function checkValue(uint amount) returns (bool){
        return true;
    }
    
    function loan() returns (bool){
        return true;
    }
}