tmpnam

 

C

语言

类型的支持

动态内存管理

错误处理

程序实用工具

日期和时间工具

字符串库

算法

数值计算

输入/输出的支持

本地化的支持

线程的支持 （C11）

原子操作 （C11）

 

File input/output

功能 Original: Functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
文件访问 Original: File access The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fopen freopen fclose fflush	fwide setbuf setvbuf
直接输入/输出 Original: Direct input/output The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fread
fwrite
未格式化的输入/输出 Original: Unformatted input/output The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
fgetc fgets fputc fputs getchar gets putchar puts ungetc	fgetwc fgetws fputwc fputws getwchar putwchar ungetwc
格式化输入/输出 Original: Formatted input/output The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
scanf fscanf sscanf vscanf vfscanf vsscanf （C99） （C99） （C99） printf fprintf sprintf snprintf （C99） vprintf vfprintf vsprintf vsnprintf （C99）	wscanf fwscanf swscanf vwscanf vfwscanf vswscanf （C99） （C99） （C99） wprintf fwprintf swprintf vwprintf vfwprintf vswprintf
文件定位 Original: File positioning The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
ftell
fgetpos
fseek
fsetpos
rewind
错误处理 Original: Error handling The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
clearerr
feof
ferror
perror
对文件的操作 Original: Operations on files The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
remove
rename
tmpfile
tmpnam

 

Defined in header <stdio.h>
char *tmpnam( char *filename );

创建一个唯一的文件名，并将其存储在字符串中指出，filename。该功能能够产生高达TMP_MAX唯一的文件名，但是它们中的一些或全部可能是在文件系统中的使用，从而不适合的返回值.

Original:

Creates an unique filename and stores it in character string pointed to by filename. The function is capable of generating up to TMP_MAX of unique filenames, but some or all of them may be in use in the filesystem and thus not suitable return values.

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参数

filename

-

的结果缓冲器被用来作为字符串的指针。如果NULL传递，返回一个指针，指向一个内部静态缓冲区. Original: pointer to the character string to be used as a result buffer. If NULL is passed, a pointer to an internal static buffer is returned. The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

返回值

filename如果filenameNULL。否则，返回一个指针，指向一个内部静态缓冲区。如果没有合适的文件名，可以产生NULL返回.

Original:

filename if filename was not NULL. Otherwise a pointer to an internal static buffer is returned. If no suitable filename can be generated, NULL is returned.

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为例

#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
 
int main(int argc, char *argv[])
{
    printf("Welcome to %s\n", argv[0]);
    printf("Called with %u arguments\n", argc - 1);
 
    char buffer[L_tmpnam] = {'\0'};
    tmpnam(buffer);
    printf(buffer);
    printf("\n");
 
    printf("Goodbye!\n");
    exit(EXIT_SUCCESS);
}

Output:

Welcome to ./main_release
Called with 0 arguments
/tmp/file6HADua
Goodbye!

另请参阅

tmpfile	返回一个指针到一个临时文件中 Original: returns a pointer to a temporary file The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数）
C++ documentation for tmpnam