Windows平台下cpp中的构造函数的小帮助 [英] small help about the constructor in cpp under windows platform

问题描述

先生.

我创建了一个包含一个默认值和一个参数构造函数的类.

sir.

i create a class which containing one default and one parameter constructor..

class cSimple
{
private:
    int icount;
    int iLoopValue;
public:                 //always constructure must be in public
        cSimple()
        {
            icount=0;
        }
        cSimple(int iTemp)
        {
            iLoopValue=iTemp;
        }
        void MyFunction()
        {
            for(;icount<iLoopValue;icount++)
                cout<<"The count value is :"<<icount<<endl;
        }
};

我的疑问:


我可以创建一个对象来调用两个构造函数吗?.
如果我这样做就意味着它无法正常运行..您能给出解决方案/

my doubt :


can i create a one single object to make a call to both the constructor..
if i done like that means it not running properly .. can you give the solution/


if it possible to call both the constructor with using single object..

推荐答案

cSimple()
{
    if(CommonInit() != 0){error handling}
}
cSimple(int iTemp)
{
   if(CommonInit() != 0){error handling}
   iLoopValue=iTemp;
}
int CSimple::CommonInit()
{
  icount = 0;
  iLoopValue = 0; //Don''t leave any members uninitialized

  return 0;
}

，您不能调用MyFunction( )在构造函数中，但是如果发生严重错误或无法进行错误处理，这将很危险


最好是默认arg:

cSimple(int iTemp = 0)

you cant call MyFunction() inside the constructor, but this is dangerous if severe errors are happening or no error handling possible


best is default arg:

cSimple(int iTemp = 0)

您可以为已创建的对象显式调用构造函数:

You can call a constructor explicitly for an already created object:

cSimple myS; // Normal constructor call, creates the object

myS.cSimple::cSimple(134); // Explicit constuctor call on an existing object

这样，您可以在同一个对象上调用多个构造函数.这不是推荐的做法.

This way you can call several constructors on the same object. This not a recommended practice.

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