通过char读取char

Question

我的问题有点奇怪，但是如何仅通过使用operator<<就可以不使用scanf()和getchar()从键盘char中读取一些字符串，例如，我想更改读取的每个字母a通过*预先感谢

Answer 1

char c;
std::string output;


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

   output += c;

}

Answer 2

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 3

Try writing out to a type of char.

char cReadFromStream;

stream >> cReadFromStream;

Answer 4

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 .