std::fputc, std::putc
From cppreference.com
 
 
 
 
 
 C++ 
 Feature test macros (C++20)
 Concepts library (C++20)
 Metaprogramming library (C++11)
 Ranges library (C++20)
 Filesystem library (C++17)
 Concurrency support library (C++11)
 Execution control library (C++26)
Input/output library 
 
 
 
 
 
 
 
 
 
 
 
 
 Print functions (C++23)
 Buffers
(C++23)
(C++98/26*)
(C++20)
 Streams
 Abstractions
 File I/O
 String I/O
 Array I/O
(C++23)
(C++23)
(C++23)
(C++98/26*)
(C++98/26*)
(C++98/26*)
 Synchronized Output
(C++20)
 Types
 Error category interface
(C++11)
(C++11)
C-style I/O 
 
  
 
 
 
 
 
 
 
 
 
 Types and objects
 Functions
 File access
 Direct input/output
 Unformatted input/output
 Formatted input
(C++11)(C++11)(C++11)    
(C++11)(C++11)(C++11)    
 Formatted output
(C++11)
(C++11)    
 File positioning
 Error handling
 Operations on files
Defined in header 
 
 
<cstdio> 
 Writes a character ch to the given output stream stream.
Internally, the character is converted to unsigned char just before being written.
In C, putc() may be implemented as a macro, which is disallowed in C++. Therefore, calls to std::fputc() and std::putc() always have the same effect.
Contents
[edit] Parameters
 ch
 -
 character to be written
 stream
 -
 output stream
[edit] Return value
On success, returns the written character.
On failure, returns EOF and sets the error indicator (see std::ferror() ) on stream.
[edit] Example
Run this code
#include <cstdio> int main() { for (char c = 'a'; c != 'z'; c++) std::putc(c, stdout); // putchar's return value is not equal to the argument int r = 0x102A; std::printf ("\nr = 0x%x\n", r); r = std::putchar (r); std::printf ("\nr = 0x%x\n", r); }
Possible output:
abcdefghijklmnopqrstuvwxy r = 0x102A * r = 0x2A
[edit] See also
C documentation  for fputc, putc