#include <iostream>
using namespace std;
int main( )
{
  char c;
  while(!cin.eof( )) //eof( )为假表示未遇到文件结束符
  if((c=cin.get( ))!=' ') //检查读入的字符是否为空格字符
   cout.put(c);
  return 0;
}

C++ is very interesting.↙
C++isveryinteresting.
^Z(结束)

  c=cin.peek( );

  cin.putback(ch);

#include <iostream>
using namespace std;
int main( )
{
  char c[20];
  int ch;
  cout<<"please enter a sentence:"<<endl;
  cin.getline(c,15,'/');
  cout<<"The first part is:"<<c<<endl;
  ch=cin.peek( ); //观看当前字符
  cout<<"The next character(ASCII code) is:"<<ch<<endl;
  cin.putback(c[0]); //将'I'插入到指针所指处
  cin.getline(c,15,'/');
  cout<<"The second part is:"<<c<<endl;
  return 0;
}

please enter a sentence:
I am a boy./ am a student./↙
The first part is:I am a boy.
The next character(ASCII code) is:32(下一个字符是空格)
The second part is:I am a student

  cin.ignore(n, 终止字符)

  ighore(5, 'A') //跳过输入流中个字符，遇'A'后就不再跳了

  ignore( ) // n默认值为，终止字符默认为EOF

  ignore(1, EOF)

#include <iostream>
using namespace std;
int main( )
{
  char ch[20];
  cin.get(ch,20,'/');
  cout<<"The first part is:"<<ch<<endl;
  cin.get(ch,20,'/');
  cout<<"The second part is:"<<ch<<endl;
  return 0;
}

I like C++./I study C++./I am happy.↙
The first part is:I like C++.
The second part is:(字符数组ch中没有从输入流中读取有效字符)

#include <iostream>
using namespace std;
int main( )
{
  char ch[20];
  cin.get(ch,20,'/');
  cout<<"The first part is:"<<ch<<endl;
  cin.ignore( );//跳过输入流中一个字符
  cin.get(ch,20,'/');
  cout<<"The second part is:"<<ch<<endl;
  return 0;
}

I like C++./I study C++./I am happy.↙
The first part is:I like C++.
The second part is:I study C++.