[英]Need to know how to parse words by space in c. Also need to know if I am allocating memory correctly?
[英]C: How can I know what header do I need for the functions I am using?
C中的示例程序 (无标题):
int main()
{
printf("\nHello World\n");
}
如何才能知道包含标题的内容 (例如: #include <stdio.h>
)?
考虑到你可能无法在线搜索(这是我猜的大部分时间都是明显的选择)并且你在linux机器上也可以在手册页中搜索它。
要在手册页内搜索,您可以使用man -k {search term}
例如printf
$ man -k printf
asprintf (3) - print to allocated string
dprintf (3) - formatted output conversion
fprintf (3) - formatted output conversion
fwprintf (3) - formatted wide-character output conversion
printf (1) - format and print data
printf (3) - formatted output conversion
snprintf (3) - formatted output conversion
sprintf (3) - formatted output conversion
swprintf (3) - formatted wide-character output conversion
vasprintf (3) - print to allocated string
vdprintf (3) - formatted output conversion
vfprintf (3) - formatted output conversion
vfwprintf (3) - formatted wide-character output conversion
vprintf (3) - formatted output conversion
vsnprintf (3) - formatted output conversion
vsprintf (3) - formatted output conversion
vswprintf (3) - formatted wide-character output conversion
vwprintf (3) - formatted wide-character output conversion
wprintf (3) - formatted wide-character output conversion
XtAsprintf (3) - memory management functions
$ man 3 printf
PRINTF(3) Linux Programmer's Manual PRINTF(3)
NAME
printf, fprintf, dprintf, sprintf, snprintf, vprintf, vfprintf, vdprintf, vsprintf, vsnprintf - formatted output conversion
SYNOPSIS
#include <stdio.h>
int printf(const char *format, ...);
int fprintf(FILE *stream, const char *format, ...);
...
使用它作为参考C库引用 ,让你的代码工作使用它
#include <stdio.h>
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