Inheritance is supported in Solidity. The is keyword is used to derive a contract from another contract. In the following example, valueChecker2 is derived from the valueChecker contract. The derived contract has access to all non-private members of the parent contract:
pragma solidity ^0.4.0;
contract valueChecker
{
uint8 price = 20;
event valueEvent(bool returnValue);
function Matcher(uint8 x) public returns (bool)
{
if (x>=price)
{
valueEvent(true);
return true;
}
}
}
contract valueChecker2 is valueChecker
{
function Matcher2() public view returns (uint)
{
return price+10;
}
}
In the preceding example, if the uint8 price = 20 is changed to uint8 private price = 20, then it will not be accessible by the valueChecker2 contract. ...
