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SolidityInheritanceMultiple.sol
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SolidityInheritanceMultiple.sol
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// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.8.2 <0.9.0;
contract StorageArea
{
uint internal digit1;
uint internal digit2;
function setFirstDigit(uint _value) public
{
digit1=_value;
}
function setSecondDigit(uint _value) public
{
digit2=_value;
}
}
//Inheritance - IS
// Super contract : StorageArea
//Derived Contract : ArithOperation
contract ArithOperation is StorageArea
{
uint internal result;
function getAddition() public
{
result = digit1 + digit2;
}
function getSubtraction () public
{
if(digit1>digit2)
{
result = digit1 - digit2;
}
else
{
result = digit2 - digit1;
}
}
}
// Super contract : StorageArea
//Derived Contract : RelationOperation
contract RelationOperation is StorageArea
{
uint internal minmax;
function getMax() public
{
if(digit1 > digit2)
minmax=digit1;
else
minmax=digit2;
}
function getMin() public
{
if(digit1 < digit2)
minmax=digit1;
else
minmax=digit2;
}
}
// Super contract : ArithOperation
//Derived Contract : ViewResult
contract ViewResult is ArithOperation, RelationOperation
{
function viewArithResult() view public returns(uint)
{
return result;
}
function viewRelationResult() view public returns (uint)
{
return minmax;
}
function viewFirstDigit() view public returns (uint)
{
return digit1;
}
function viewSecondDigit() view public returns (uint)
{
return digit2;
}
}