Putchar

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.

ample 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

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(' '); /* trailing ' ' 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.

ee also

*stdio.h
*C standard library
*getchar

References

* [http://www.cplusplus.com/ref/cstdio/putchar.html putchar on Cplusplus.com]