solidity智能合约[27]-函数与函数重载

function (<parameter types>) {public|internal|external} [pure|constant|view|payable] [returns (<return types>)]

uint public num;
 string public name;

 function setparam(uint _num,string _name) public {
     num  = _num;
     name = _name;
 }

pragma solidity ^0.4.23;


contract funcParam{

    //状态变量
    uint public num;
    string public name;
    //代餐函数
    function setparam(uint _num,string _name) public {
        num  = _num;
        name = _name;
    }

    //调用
    function Test() public {
        setparam(99,"bob");
    }

    //函数命名参数
      function Test2() public {
        setparam({_num:99,_name:"bob"});
    }

      function Test3() public {
        setparam({_name:"Alice",_num:999});
    }

    //错误代码，参数个数不匹配
    // function Test4() public {
    //     setparam(100);
    // }

}

function  fun(){

}

 function  fun(){

}

function  fun() returns(uint){

 }

  function  fun() returns(bytes1){

 }

  function  fun() returns(uint){

}

 function  fun(){

}

function  fun(uint k) public pure{

 }

function  fun() public pure{

}

function  fun2(uint a) public pure{

}

function  fun2(bytes1 b) public pure{

}

function  fun3(uint a) public {
  num = 256;
}

function  fun3(uint8 b) public{
   num = 8;
}

 function test() public{
  //fun3(2);错误，不明确
  fun3(256);
    fun3(uint256(2));
}