c - C中输出单个字符

Question

在 C 程序中打印单个字符时，格式字符串中必须使用“%1s”吗？我可以使用类似“%c”的东西吗？

Answer 1

是的，%c 将打印一个字符:

printf("%c", 'h');

此外，putchar/putc 也可以。来自“man putchar”:

#include <stdio.h>

int fputc(int c, FILE *stream);
int putc(int c, FILE *stream);
int putchar(int c);

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

编辑:

另请注意，如果您有一个字符串，要输出单个字符，您需要获取要输出的字符串中的字符。例如:

const char *h = "hello world";
printf("%c\n", h[4]); /* outputs an 'o' character */