std::putchar (3) Linux Manual Page

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

See also

      writes a character to a file stream
fputc (function)
putc