如何检查文件中是否包含c中的字符？ [英] How to check if a file contains characters in c?

问题描述

我想读一个文件是否包含任何caharactes。如果是这样，那么我将代码如果它的emty将 printf 我的消息和返回0; 。



如何使用C？

I want to read if a file contains any caharactes. If so then I will procide to code if its emty will printf me a message and return 0;.

How do I do that with C?

推荐答案

绝对可以将任何内容视为序列零个或多个字符。这一切都取决于假定的编码，但是即使是单个字节也始终至少有一种解释，将其视为一个字符（这种理解对于C来说非常典型，其中 char的声明用于声明单个字节。



因此，检查文件是否存在而不是空。网络搜索将为您提供一些功能。

-SA

Absolutely any content can be considered as a sequence of zero or more characters. It all depends on assumed encoding, but there is always at least one interpretation even of a single byte, to consider it as a character (and this understanding is very typical for C, where the declaration of char is used to declare a single byte).

Therefore, check up if the file exists and not empty. Web search will give you some functions to do that.

—SA

这是它！

Here is it!

fscanf(fp,"%d",&num);                                                   // here goes the fscanf() command  ?Do I need to use fget()?

         fseek(fp, 0, SEEK_END);
            if (ftell(fp) == 0) {
            printf("file is emty");                                             // empty file
            }
            fseek(fp, 0, SEEK_SET);

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