The classes istream and ostream define two member functions get(),put() respectively to handle the single character input/output operations.
There are two types of get() functions.Both get(char *) and get(void) prototype can be used to fetch a character
including the blank space,tab and newline character. The get(char *) version assigns the input character to its argument and the get(void) version returns the input character. Since these functions are members of input/output Stream classes,these must be invoked using appropriate objects.
Example
Char c;
cin.get( c ) //get a character from the keyboard and assigns it to c
while( c!=’\n’)
{ cout<< c; //display the character on screen
cin.get( c ) //get another character
}
this code reads and display a line of text. The operator >> can be used to read a character but it will skip the white spaces and newline character.The above while loop will not work properly if the statement
cin >> c; is used in place of cin.get ( c );
The get(void) version is used as follows
…………..
char c;
c= cin.get();
…………
The value returned by the function get() is assigned to the variable c. The function put(), a member of ostream class can be used to output a line of text, character by character.
For example
cout.put(‘x’);
displays the character x and
cout.put(ch);
displays the value of variable ch.
The variable ch must contain a character value.A number can be used as an argument to function put().
For example,
cout.put(68);
displays the character D.This statement will convert the numeric value 68 to a char value and displays character whose ASCII value is 68.
The following segment of a program reads a line of text from keyboard and displays it on the screen
char c;
cin.get ( c );
while( c!= ‘\n’)
{ cout.put(c);
cin.get ( c);
}
The program below illustrate the use of two character handling functions.
Program
Character I/O with get() and put()
#include <iostream.h>
using namespace std;
int main()
{
int count=0;
char c;
cout<<”INPUT TEXT \n”;
cin.get( c );
while ( c 1=’\n’ )
{ cout.put( c);
count++;
cin.get( c );
}
cout<< “\n Number of characters =” ----”\n”;
return 0;
}
Input
Object oriented programming
Output
Object oriented programming
Number of characters=27
