feof

 

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>
int feof( FILE *stream );

如果给定的文件流的末尾检查已达到.

Original:

Checks if the end of the given file stream has been reached.

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参数

stream

-

文件流检查 Original: the file stream to check 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

非零值，如果已到达流的末尾，否则​0​

Original:

nonzero value if the end of the stream has been reached, otherwise ​0​

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注释

此功能只流的状态报告，报告的最近期的I / O操作，它不检查关联的数据源。例如，如果最近​​的I / O是一个fgetc，它返回一个文件的最后一个字节，feof返回非零。 fgetc失败和改变流的状态为“文件结束”。只有这样，feof返回为零

Original:

This function only reports the stream state as reported by the most recent I/O operation, it does not examine the associated data source. For example, if the most recent I/O was a fgetc, which returned the last byte of a file, feof returns non-zero. The next fgetc fails and changes the stream state to end-of-file. Only then feof returns zero.

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在典型的使用中，输入流处理停止的任何错误;feof和ferrror然后用于区分不同的错误条件.

Original:

In typical usage, input stream processing stops on any error; feof and ferrror are then used to distinguish between different error conditions.

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为例

#include <stdio.h>
#include <stdlib.h>
 
int main()
{
    FILE* fp = fopen("test.txt", "r");
    if(!fp) {
        perror("File opening failed");
        return EXIT_FAILURE;
    }
 
    int c; // note: int, not char, required to handle EOF
    while ((c = fgetc(fp)) != EOF) { // typical file reading loop
       putchar(c);
    }
 
    if (ferror(fp))
        puts("I/O error when reading");
    else if (feof(fp))
        puts("End of file reached successfully");
}

另请参阅

clearerr	清除错误 Original: clears errors The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数）
perror	显示一个字符串相应的电流误差stderr Original: displays a character string corresponding of the current error to stderr The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （函数）
ferror	检查文件错误 Original: checks for a file error 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 feof