5.5,5.6

5.5 looping and text input

Use Cin to enter

1#include <iostream>2 intMain ()3 {4     using namespacestd;5     Charch;6     intCount=0;7cout<<"Enter the Characters,enter #to quit";8Cin>>ch;9      while(ch!='#')Ten     { Onecout<<ch; Acount++; -Cin>>ch; -     } thecout<<endl<<count<<"characters Read"; -     return 0; -}

The program enters characters, with # as the closing tag, and counts the number of characters before the #.

CIN ignores spaces and line breaks, so there are no statistics and no spaces displayed.

Use Cin.get (CH) to read the next character of the input, even if it is a space, and assign it to the variable ch.

1#include <iostream>2 intMain ()3 {4     using namespacestd;5     Charch;6     intCount=0;7cout<<"Enter the Characters,enter #to quit";8Cin.Get(CH);9      while(ch!='#')Ten     { Onecout<<ch; Acount++; -Cin.Get(CH); -     } thecout<<endl<<count<<"characters Read"; -     return 0; -}

End of File condition: Detect end of file (EOF)

member functions EOF () and Fail ()

CTRL + Z indicates the end.

1#include <iostream>2 intMain ()3 {4     using namespacestd;5     Charch;6     intCount=0;7cout<<"Enter the Characters,enter #to quit";8Cin.Get(CH);9      while(Cin.fail () = =false)Ten     { Onecout<<ch; Acount++; -Cin.Get(CH); -     } thecout<<endl<<count<<"characters Read"; -     return 0; -}

Cin.clear () can clear the EOF marker so that the input continues.

5.5,5.6