reading char by char

Question

my question is a little bit strange, but how is it possible to read some string from keyboard char by char without using scanf() and getchar() only by using operator<<, for example I want to change every letter a which I read by * thanks in advance

Answer 1

Depending on your purposes, you may find it adequate to do this:

#include <iostream>
#include <iomanip>

char c;

std::cin >> std::noskipws;

while (std::cin >> c)
    std::cout << c == 'a' ? '*' : c;

See http://www.cplusplus.com/reference/iostream/manipulators/noskipws/ for further details of noskipws, which is crucial as otherwise operator>> will skip over spaces, tabs and newlines until it finds other characters to put in 'c', resulting in all the aforementioned whitespace characters being removed from your output.

Answer 2

Try writing out to a type of char.

char cReadFromStream;

stream >> cReadFromStream;

Answer 3

You cannot. operator << uses cooked inputs.

However, if you really meant you are looking for a solution using C++ iostreams and not C stdio functions, then use cin.get() which is the C++ iostreams equivalent to getchar.

Answer 4

char c;
std::string output;


while(std::cin >> c)
{
   if(c == 'a')
      c = '*';

   output += c;

}