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{

   //狀態(tài)變量
   uint public num;
   string public name;
   //代餐函數(shù)
   function setparam(uint _num,string _name) public {
       num  = _num;
       name = _name;
   }

   //調(diào)用
   function Test() public {
       setparam(99,"bob");
   }

   //函數(shù)命名參數(shù)
     function Test2() public {
       setparam({_num:99,_name:"bob"});
   }

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

   //錯誤代碼，參數(shù)個數(shù)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);錯誤，不明確
 fun3(256);
   fun3(uint256(2));
}