C programming/stdio.h/putchar

putchar is a function in the C programming language that writes a single character to the standard output stream, stdout.http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1124.pdf ISO/IEC 9899:1999 specification p. 299, § 7.19.7.9 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(void) { char str[1000]; int ch, i, n = 0; while ((ch = getchar()) != EOF && n < 1000) str[n++] = ch; for (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. References External links C++ reference for std::putchar deep