std::putchar (3) - Linux Manuals

std::putchar: std::putchar

NAME

std::putchar - std::putchar

Synopsis

Defined in header <cstdio>
int putchar( int ch );

Writes a character ch to stdout. Internally, the character is converted to unsigned char just before being written.
Equivalent to putc(ch, stdout).

Parameters

ch - character to be written

Return value

On success, returns the written character.
On failure, returns EOF and sets the error indicator (see ferror()) on stdout.

Example

// Run this code

  #include <cstdio>

  int main()
  {
      for (char c = 'a'; c != 'z'; c++)
          std::putchar(c);
      std::putchar('\n');

      // putchar return value is not equal to the argument
      int r = 0x1070;
      std::printf("\n0x%x\n", r);
      r = std::putchar(r);
      std::printf("\n0x%x\n", r);
  }

Output:

  abcdefghijklmnopqrstuvwxy
  0x1070
  p
  0x70