`istream :: get`和`operator>>>（istream& char&）的区别 [英] Difference between `istream::get` and `operator>>(istream&, char&)`

问题描述

使用 istream :: get 和 operator>>（istream& char;&）：

  char ch; 
 cin.get（ch）; 
 cin>> ch;您可以解释阻止1 无效的可能原因，   块2 有效
  cin.get（）。get * 
 char ch; 
 cin.get（ch）.get（ch）; //不给出错误**块2 ** 
  
我的猜测是：
 
 
 
块1相当于 cin> >> ;;  while block 2  cin>> ch>> ch;  
解决方案
  istream :: get（char c）返回 istream& ，而其他无参版本返回int。 
 
 
 
因此，在第二个版本中，您可以通过 istream& 这是完全合法的，而在第一个尝试调用方法get的不合法 int 
 
What is the difference between using istream::get and operator>>(istream&, char&):
char ch;    
cin.get(ch);
cin>>ch;
Can you explain the possible reason block 1 is invalid while block 2 is valid
cin.get().get();//Error **block 1**
char ch;
cin.get(ch).get(ch);//Doesn't gives an error  **block 2**
My guess would be:

block 1 is equivalent to cin>> >>; while block 2 cin>>ch>>ch;
解决方案
istream::get(char c) returns an istream&, while the other no-argument version returns int. 

So in the second version you invoke .get(ch) over an istream& which is perfectly legal, while in the first one you attempt to call method get of an int which is not legal.

                        
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