【转载】        https://blog.csdn.net/wtdask/article/details/81980649
子合约继承的属性和方法的权限pragma solidity ^0.4.4;/*public >internal(这是合约属性默认的访问权限) >private */contract Animal {  uint _weight;  uint private _height;  uint internal _age;  uint public _money; //public  function test() constant public returns (uint) {    return _weight;  }  function test1() constant public returns (uint) {    return _height;  }  function test2() constant internal returns (uint) {    return _age;  }  function test3() constant private returns (uint) {    return _money;  }}contract Dog is Animal{  function testWeigh() constant public returns (uint) {    return _weight;  }  function testHeight() constant public returns (uint) {    return _height;  }  function testAge() constant public returns (uint) {    return _age;  }  function testMoney() constant public returns (uint) {    return _money;  }}

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子合约只可以继承public类型的函数，而子合约可以继承public和internal类型的属性。

pragma solidity ^0.4.4;/*public >internal(这是合约属性默认的访问权限) >private */contract Animal {  uint _weight;  uint private _height;  uint internal _age;  uint public _money; //public  function test() constant public returns (uint) {    return _weight;  }  function test1() constant public returns (uint) {    return _height;  }  function test2() constant internal returns (uint) {    return _age;  }  function test3() constant private returns (uint) {    return _money;  }}contract Animal1 {  uint _sex;//1 男  0 女  function Animal1() public {    _sex = 1;  }  function sex() constant public returns (uint) {    return _sex;  }}contract Dog is Animal,Animal1{  function testWeigh() constant public returns (uint) {    return _weight;  }  /* function testHeight() constant public returns (uint) {    return _height;  } */  function testAge() constant public returns (uint) {    return _age;  }  function testMoney() constant public returns (uint) {    return _money;  }  function sex() constant returns (uint) {    return 0;  }}

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奈斯，加油加油