pragma solidity ^0.4.0;contract Test{/* 属性的访问权限priveta public internaldefualt internalinterlnal,private cannot be accessed from outside*/uint8 internal _money;uint8 _age;uint8 private _height;uint8 public _sex;/*uint8 public _sex == function _sex() returns(uint8) 当属性类型为public时,会生成一个和属性名相同并且返回值就是当前属性的get函数function _sex()函数会覆盖掉public类型的属性自动生成的get函数;_sex()返回的是1,而不是0*/function _sex() returns(uint8){//return _sex;//this._age; return this.age();TypeError: Member "age" not found or not visible after argument-dependent lookup in contract Testthis._sex();return 1;}/*方法的访问权限//public private internal external//defualt public//internal private cannot be accessed from outside*/function sex() returns(uint8){return 1;}function age() internal returns(uint8){return 18;}function height() public returns(uint8){return 175;}function money() private returns(uint){return 3500;}function year() external returns(uint){return 2018;}function testInternal() returns(uint){//return this.sex();//return this.year(); this(指针) 通过合约地址进行访问 return money();//return this.age();TypeError: Member "age" not found or not visible after argument-dependent lookup in contract Person//
    }
}

无论是属性还是方法,只有是public/external类型时,才可以通过合约地址进行访问,合约内部的this就是当前合约地址。在合约内部如果要访问internal,private类型的属性或者是函数,直接访问即可,不要试图通过this去访问

//本合约内部调用
//this.external调用
function test() public{getC(); //interlthis.getD();//externalgetE();//privatethis.kill();//publickill();//public
}//未使用继承,外部调用
//只能调用external/public
contract mytract{function getA() public {**getC(); //interlthis.getD();//external**getE();//privatethis.kill();//public**kill();//public}}//使用继承,外部调用
//无法调用私有变量
contract mytract is Funder{function getA() public {getC(); //interlthis.getD();//external**getE();//privatethis.kill();//publickill();//public}
}