实现合约接口并且合约间互相调用

1 interface 修饰接口合约
通过 is关键字实现接口，通过override关键字改写方法
通过实现的合约地址实现多个合约间的互相调用

pragma solidity ^0.8.0;

interface Caller{
    function repeat(address _count)external;
}

contract CallerImpl is Caller{
// input countImpl's address contract address
    function repeat(address _count)public  virtual override{
        Counter(_count).countToten();
    }
}

interface Counter{
    function countToten()external;
}

contract ConterImpl is Counter{
    uint256 public c;
    function countToten()public  virtual override{
        if(c==10){
            return;
        }else{
            c=c+1;
            // CallerImpl's address contract address
            Caller(0xE3Ca443c9fd7AF40A2B5a95d43207E763e56005F).repeat(address(this));
        }
    }
}

不同节点部署的合约通过 合约地址实现调用，在要调用的合约中必须编写被调用合约的要调用的接口
A合约具有两个方法：

pragma solidity ^0.8.0;

interface Caller{
    function repeat(address _count)external;
}

interface Counter{
    function countToten()external;
}

contract CallerImpl is Caller{
    address public addr;
    function repeat(address _count)public  virtual override{
        Counter(_count).countToten();
    }
    function getAddr()public view returns(address _addr){
        return addr;
    }
}

B合约只想调用A合约的 repeat方法：

pragma solidity ^0.8.0;

interface Caller{
    function repeat(address _count)external;
}
//Counter's interface
//defining for address use
interface Counter{
    function countToten()external;
}

contract ConterImpl is Counter{
    uint256 public c;
    function countToten()public  virtual override{
        if(c==10){
            return;
        }else{
            c=c+1;
            // CallerImpl's address contract address
            Caller(0xD4Fc541236927E2EAf8F27606bD7309C1Fc2cbee).repeat(address(this));
        }
    }
    function setZero()public{
        c=0;
    }
}