C语言基本问题 头文件

Question

大侠你好 小弟知道用到printf sacnf 的时候要写 #include"stdio.h",那用到getchar putchar 时写什么呢？ 也写#include"stdio.h"吗？还是..

麻烦了！

Answer 1

命令man getchar就知道了：

GETS(3) Linux Programmer's Manual GETS(3)

NAME
fgetc, fgets, getc, getchar, gets, ungetc - input of characters and strings

SYNOPSIS
#include <stdio.h>

int fgetc(FILE *stream);

char *fgets(char *s, int size, FILE *stream);

int getc(FILE *stream);

int getchar(void);

char *gets(char *s);

int ungetc(int c, FILE *stream);

DESCRIPTION
fgetc() reads the next character from stream and returns it as an unsigned char cast to an int, or EOF on
end of file or error.

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

getchar() is equivalent to getc(stdin).

Answer 2

iostream.h string.h