bc calaculator

pragma solidity ^0.5.0;

contract Calculator
{

	function add(int a, int b) public pure returns (int)

{
return (a+b);
}
function sub(int a, int b) public pure returns (int)
{
return (a-b);
}
function mul(int a, int b) public pure returns (int)
{
return (a*b);
}
function div(int a, int b) public pure returns (int)
{
return (a/b);
}
}