c - 如何在没有fopen的情况下读取C中的文本文件

Question

can anyone help me? I need to read a file called address.txt and work with each word in there (I have one word per line to make it simple).

I am forbidden to use these functions:

Malloc, freee, fopen, fclose, fscanf,... qsort, lsearch, bsearch a hsearch I think the teacher wants us to use getchar, argv, argc or something like that.

Let's say the name of the program is test.c ____ /test.c < address.txt

If I write this as an argument when starting the program, I should be able to work with the text file. Any tips how to extract the data stored in address.txt? I have tried several times without success :/ Only fopen worked for me.

编辑:我所做的一切都很好，Code::Blocks 编辑程序导致了问题。我在Linux终端上尝试了一下，效果非常好! :)

Answer 1

是的，如果你的程序是这样启动的:

$ ./test < address.txt

然后(假设有一个兼容的操作系统，但这在主要桌面系统中是相当标准的)您的程序将以连接到文件 address.txt 的内容的 stdin 流启动>.

所以你可以使用getchar()从中阅读并找到单词。

请注意，您不会启动 C 文件，您必须先编译它。