putchar
From Wikipedia, the free encyclopedia
putchar is a function in C programming language that writes a single character to the standard output stream, stdout. 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.
[edit] 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(void) { char str[1000]; int ch, n = 0; while ((ch = getchar()) != EOF && n < 1000) str[n++] = ch; for (int i = 0; i < n; ++i) putchar(str[i]); putchar('\n'); /* trailing '\n' needed in Standard C */ return 0; }
The program specifies the reading length's maximum value at 1000 characters. It will stop reading either after reading 1000 characters or after reading in an end-of-file indicator, whichever comes first.
