fputs 中文man頁面

作者：徐明 2011-08-25 16:25:30

fputc() 把字符 c 轉換到 unsigned char 類型, 然后從 stream 流輸出.

NAME

fputc, fputs, putc, putchar, puts - 輸出字符和字符串

總覽 (SYNOPSIS)

#include <stdio.h>

int fputc(int c, FILE *stream);
int fputs(const char *s, FILE *stream);
int putc(int c, FILE *stream);
int putchar(int c);
int puts(const char *s);

描述 (DESCRIPTION)

fputc() 把字符 c 轉換到 unsigned char 類型, 然后從 stream 流輸出.

fputs() 把字符串 s 從 stream 流輸出, 但是不輸出結尾處的 '\0'.

putc() 等于 fputc() , 只是它可能以宏的形式實現, 并多次訪問 stream 流.

putchar(c); 等于 putc(c,stdout).

puts() 從 stdout 輸出字符串 s 和一個換行符 (newline).

這里描述的函數可以混合使用, 也可以結合 stdio 庫中其他的輸出函數處理同一個輸出流.

相應的無鎖函數(non-locking) 參見 unlocked_stdio(3).

返回值 (RETURN VALUE)

如果操作成功, fputc(), putc() 和 putchar() 返回把字符從 unsigned char 類型轉換來的 int 值, 否則返回 EOF .

如果操作成功, puts() 和 fputs() 返回大于等于零的值, 否則返回 EOF .

參考標準 (CONFORMING TO)

ANSI - C, POSIX.1

BUGS

建議不要混合 stdio 庫的輸出函數和低層 write() 函數對輸出流對應文件描述符的調用; 其結果沒有定義, 極可能不是你需要的.

另見 (SEE ALSO)

write(2), ferror(3), fopen(3), fseek(3), fwrite(3), gets(3), scanf(3), unlocked_stdio(3)

#p#

NAME

fputc, fputs, putc, putchar, puts - output of characters and strings

SYNOPSIS

#include <stdio.h>

int fputc(int c, FILE *stream);
int fputs(const char *s, FILE *stream);
int putc(int c, FILE *stream);
int putchar(int c);
int puts(const char *s);

DESCRIPTION

fputc() writes the character c, cast to an unsigned char, to stream.

fputs() writes the string s to stream, without its trailing '\0'.

putc() is equivalent to fputc() except that it may be implemented as a macro which evaluates stream more than once.

putchar(c); is equivalent to putc(c,stdout).

puts() writes the string s and a trailing newline to stdout.

Calls to the functions described here can be mixed with each other and with calls to other output functions from the stdio library for the same output stream.

For non-locking counterparts, see unlocked_stdio(3).

RETURN VALUE

fputc(), putc() and putchar() return the character written as an unsigned char cast to an int or EOF on error.

puts() and fputs() return a non-negative number on success, or EOF on error.

CONFORMING TO

ANSI - C, POSIX.1

BUGS

It is not advisable to mix calls to output functions from the stdio library with low - level calls to write() for the file descriptor associated with the same output stream; the results will be undefined and very probably not what you want.