Misplaced Pages

This is an old revision of this page, as edited by Deryck Chan (talk | contribs) at 08:04, 21 February 2006. The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

This article is actively undergoing a major edit for a little while. To help avoid edit conflicts, please do not edit this page while this message is displayed. This page was last edited at 08:04, 21 February 2006 (UTC) (18 years ago) – this estimate is cached, update. Please remove this template if this page hasn't been edited for a significant time. If you are the editor who added this template, please be sure to remove it or replace it with {{Under construction}} between editing sessions.

putchar is a function in C programming language that writes a single character to the standard output. Its prototype is as follows:

int putchar (int character)

The character to be printed is fed into the function as an argument, and if the writing is successful, the argument character is returned. Otherwise, end-of-file is returned.

The putchar function is specified in the C standard library header file stdio.h.

Sample usage

The following program uses getchar to read characters into an array and print them out using the putchar function after an end-of-file character is found.

#include <stdio.h>
int main() {
  char str;
  int n = 0;
  while (!feof(stdin)) {
    str = getchar();
    ++n;
  }
  for (int i = 0; i < n; ++i) {
    putchar(str);
  }
  return 0;
}

The functi

• C standard library